Stata matrix column names College/University level statistics guide. I > mean: Given a row index, is there an elegant way to extract the name > of that row? > > The solution below seems clumsy. By default, ul cell contains the first element of matname, and matrix row names and column names are not written. For the dimensions of a ma matrix roweq and coleq also reset the row and column names of an already existing matrix, but if a simple name (a name without a colon) is specified, it is interpreted as an equation name. It may also be used to format cells in an Excel worksheet. Equation names are displayed in a manner similar to estimation results. Look like a variable? Get the variable’s label. We defined B = A0A. The row and column names are obtained from the column names of mexp if mexp is a row vector or the row names if mexp is a column vector. Row and column names are used as the row and column h aders. Optionally, they can be stored as an N k matrix, where k is the number of variables in varlist. The row and column names of C are obtained from A. Columns may have different formats, and lines may be shown between each column. The allowed values for the row index row and the column index col are -nrows <= row < nrows and -ncols <= col < ncols Here nrows is the number of rows of the specified matrix, which is returned by getRowTotal(). . matrix list lists the contents of a matrix. xlsx) files are supported. Also one can extract rows and columns with reference to row and column names, or with reference to row and column number. May 3, 2021 · Rename one particular column of a matrix in Stata Asked 4 years, 6 months ago Modified 4 years, 6 months ago Viewed 1k times Learn matrix expressions in Stata: definitions, row/column names, operators, functions, subscripting. In Stata, this would be achieved Jul 23, 2019 · I can indeed get the column/variable names with st_matrixcolstripe. collect label list coleq Collection: default Dimension: coleq Label: Depvars, parameters, and column equations Level labels: y1 Binary outcome colname Column names taken from matrix results. The code looks cumbersome, but it works. The variable names are used as column names. Another is that in this example you have a matrix with 5 rows but you have only two variables that qualify. The the Cholesky decomposition of the matrix: if R = cholesky(S), then RRT = S the equation number of M associated with column equation s; missing if the column equation cannot be found the number of free parameters in columns of M the column number of M associated with column name s; missing if the column cannot be found the number of columns of M Nov 21, 2018 · I want to replace the column names with the values in this variable. One can also interface interactively between Stata and Mata to move commands in and out. Getting started Mata is the matrix language of Stata and extremely powerful when it comes to programming estimation commands. Beyond the matrix commands, Stata has a complete matrix programming language, Mata, that provides more advanced matrix functions, support for complex matrices, fast execution speed, and the Nov 27, 2015 · Hi, Is there a command to extract the names of the columns of a matrix? Thanks! Regards, When Stata estimates _beta, it gives names to the columns of that vector. Jan 24, 2017 · The names option tells putexcel to write the row and column names to Excel along with the matrix. 0 17 November 2006 // matrix row_or_column rename program matrcrename version 8 // syntax matrixname row_or_col which_row_or_col new_name // matrix name gettoken matrix 0 : 0 confirm matrix `matrix' // row or column gettoken which 0 : 0 Example: putexcel D14=matrix(A) using file Take the Stata matrix A, and write it into Excel using column D row 14 as the upper-left cell for matrix A. matrix B=vec(mexp), where mexp evaluates to an × matrix, creates B: × 1 containing the elements of mexp starting with the first column and proceeding column by column. Thus the row and column names of the result are the row names of the first matrix and the column names of the second matrix. mat list Mar 12, 2020 · Dear Stata users, I have a large matrix that I'd like to subset it by its column equation names. My goal is to subset a matrix by using column name When putting a matrix, the matsize limit is ignored; meaning that, to use the matrix in Stata, the user may have to reset matsize or, if the matrix is too large, the user may not be able to use the matrix at all. Jun 21, 2018 · I wonder if there is a way to extract some scalars from a matrix based on their ROW NAMEs and COLUMN NAMEs? For example, after the -sem- command, I got an r (table) and save it to a matrix named "test". You can break this down for readability into local whereagecol = colnumb(b,"age") local whereagerow = colnumb(b,"age") disp b[`whereagerow',`whereagecol'] -- Stas Kolenikov, PhD, PStat (ASA, SSC) -- Senior Survey Statistician, Abt SRBI -- Opinions stated in this This option has no effect if an exp is not specified as one of the output types. All row and column numbering of the matrix begins at 0. Another question, how to show the full row/column names and avoid truncation, such as the one below: Sep 25, 2019 · Dear All, I have quick question. By default, the rows are named r1, r2, : : : . Aug 17, 2017 · One is that matrix row and column names are more limited than variable labels, in their length and in what characters can be included (which certainly don't include spaces). The Matrix matrix A = (2,1\3,2\-2,2) matrix list A A [3,2] c1 c2 r1 2 1 r2 3 2 r3 -2 2 We defined B = A0A. Equation names are displayed in a manner similar to estimation r olumn. Stata determines where to place the data in Excel by default from the size of the matrix (the number of rows and columns) and the location you specified in ul cell. Matrix (sfi. My original matrix looks like the following : Apr 17, 2019 · Consider the following toy example using the community-contributed command esttab: sysuse auto, clear estpost tabstat mpg price, statistics (count mean) columns (statistics) listwise esttab . matrix drop eliminates a matrix. Row and column names are used as the row and column headers. For example, if I want to manipulate the coefficient on the variable precip, I just type _b[preci Apr 4, 2024 · I can't seem to figure it out with "matrix list" or "matlist". Sep 29, 2016 · How do I -display- elements of a matrix, such as e (b)? display e (b) is "invalid syntax" while Stata 14 responds to display e (b) [1,1] with "matrix operators that return matrices not allowed in this context". svmat takes a matrix and stores its columns Jan 12, 2024 · I've been trying to subset a matrix that I created in Stata using matrix A = e(b) but I only want to use the coefficients of a specific dummy, specifically from column 6 until column 29. Sep 25, 2013 · mpg . ncols is the number of columns of the Here is one stab, not tested much. I am also interested in putting e (b) in the -post- command, but get the same message. For example, one of the matrices looks like the following: . Matrix) ¶ class sfi. By default, the rows are named r1, r2, . In order to get started, see help mata for extensive the Cholesky decomposition of the matrix: if = cholesky( ), then = the equation number of associated with column equation ; missing if the column equation cannot be found the number of free parameters in columns of the column number of associated with column name ; missing if the column cannot be found the number of columns of the correlation matrix of the variance matrix the determinant of I'm sorry if this is a basic question, but I couldn't find any solution, neither here nor on the Stata manual (chapter 14, "Matrix expressions"). In the test below, for matrices with less than about 10,000 rows, it's faster to precompute a colvector one2N=1::N, and then do M [one2N, 3] instead of M [. I don't know what you plan to do with this matrix once you do this. 1 Definition of a matrix ond the mathematics. Description ormat. |]. #, meaning the Kronecker product. To Stata, a matrix is a named entity containing an × rectangular array of double-precision numbers (including missing values) that is bordered by a row a d a column of names. (To assign column and row names, see matrname. The row and column names of B are the same. ncols is the number of columns of the Mar 24, 2015 · A quick review in the user manuals has not turned up anything to say that it is illegal, but it is also clear from the text and all examples that Stata matrix row and column names are often intended to match variable names--and, of course, a variable name cannot begin with a digit. Combining putexcel with a Stata command’s stored results allows you to put the table displayed in your Stata Results window in an Excel file. As seen with -matrix LostRowNames-, > extracting a one-row matrix from a one-column matrix causes the > -rownames- to be lost. matrix C=A#B, A: a b and B: c d, returns C: ac bd containing the Kronecker product A B, all elementwise products of A and B. Description mkmat stores the variables listed in varlist in column vectors of the same name, that is, N 1 matrices, where N = N, the number of observations in the dataset. Jun 7, 2022 · I can also make a list of variable names to be extracted from the matrix, but I am not familiar with looping in Stata. ) In Stata, after a regression I know it is possible to call the elements of stored results by name. We formed A0A, using the transpose of A for the first matrix—which also interchanged the names—and so obtained the names shown. Aug 23, 2016 · I would like to read off Stata matrix elements by column name so that I can loop over a varlist after running a regression. Before this one needs to firstly assign the system matrix to standard matrix, and then operate on the standard matrix. Let me show you. . Today it is less often used. svmat takes a matrix and stores its Description putexcel writes Stata expressions, matrices, images, and returned results to an Excel file. And I ca Apr 3, 2021 · Yes, apparently matrix extraction of system matrices such as e (V) and r (table) was added in Stata 16. Jun 16, 2020 · Now, while there's no link from help matrix colnames to the documentation to explain what a "simple name" is, I expected that by "simple name" they meant a name as described in the Stata User's Guide PDF section 11. What is the way to do this? Mar 4, 2015 · One of the things I like about the -matrix- in Stata is the possiblity to add row and column labels to matrices there. Column names must be unique. You can get the row/column numbers with colnumb(b,"age") and rownumb(b,"age") functions. Example: putexcel D4=("Coefficients") B5=matrix(e(b)) using file Write "Coefficients" in Excel column D row 4, and write the values of e-class matrix e(b) into Excel using column B row 5 as the upper-left cell. From Jacob Wegelin < [email protected] > To [email protected] Subject st: subsetting a matrix by rowname and column name Date Sat, 21 Mar 2009 17:43:39 -0400 I particularly like the feature that an equation name only shows up once if two columns share it. Mata can be used interactively as a matrix calculator, but it is even more useful for programming; see the Mata Reference May 28, 2020 · Regarding row names and column names, the output of help putexcel tells us there are three "names" options for the putexcel matrix command: Code: names also write row names and column names for matrix matname; may not be combined with rownames or colnames rownames also write matrix row names for matrix matname; may not be combined with names Description An introduction to matrices in Stata is found in [U] 14 Matrix expressions. You cannot format rows of the matrix differently. Description matrix rownames and colnames reset the row and column names of an already existing matrix. This entry provides an overview of the matrix commands and provides more background information on matrices in Stata. Description matrix dir lists the names of currently existing matrices. Is there something similar for Mata matrices? In the spotlight: Export tables to Excel® new feature in Stata 13, putexcel, allows you to easily export matrices, expressions, and stored results to an Excel file. matsave also creates a variable _rowname containing the row names of matrix. Is there a way to retrieve--not change--the names of the columns? After regress (or other est commands), mat b = e (b) local names: colnames b display "`names'" Kit Kit Baum, Boston College Economics and DIW Berlin /, meaning matrix division by scalar. Neither seems to admit a way to not abbreviate matrix column names. ,3\3,. 1. Jul 18, 2018 · Thanks again Steve. May 5, 2017 · Dear all, I have successfully generated a matrix after a tabulate command, but unsuccessfully set the right column and row names and would love a bit of help. Multiplication is defined for any a b and b c matrices, the result being a c. 39339742 1 To re-create the table in Excel, we need to export the matrix r (C) with the matrix row and column names. ,3] or M [,3] or M [|. For example, the name of column 1 will be Appleton, the name of colun 2 will be Beechwood I tried this code but didn't work. matrix rename changes the name of a matrix. QUESTION: how to copy the column names of one matrix to another (conforming) matrix in case they may contain spaces without Mata? Thank you, Sergiy Radyakin PS: is the above problem a bug/feature/known limitation/smth else? --------- --------- --------- --------- --------- --------- capture matrix drop a b Mar 11, 2020 · Dear STATA users, I have 11 matrix that I would like to change their row names. For the dimensions of a ma 14. 3 on Naming conventions. Excel 1997/2003 (. Currently, I am performing a sequence of regressions iteratively and aim to document the coefficients for each specification. Aug 24, 2017 · In the earliest versions of Stata, before the -syntax- command was created, -tokenize- was a much used command, being the way to parse command lines and get the names of variables in varlists or argumentlists, etc. To achieve this, I store the coefficients in a matrix and label the columns of the matrix with details about the corresponding matrix(matname) writes the values from a Stata matrix to Excel. matrix C=A/s, A: a b and s a Stata scalar (see [P] scalar) or a literal number, returns C: a b containing the elements of A each divided by s. Matrix ¶ This class provides access to Stata matrices. What is a clean and fast way of handling this problem in Stata? Jan 16, 2017 · I discovered some years ago that different syntaxes for extracting a column from a matrix have different run times. 0. In the following code it works sometimes, but not all the time. Its much more faster than Stata but also requires much more precision since it is a lower level language than Stata. But there doesn't seem to be a simple way to use that info to rename the columns in the Mata data matrix. matrix roweq and coleq also reset the row and column names of an already existing matrix, but if a simple name (a name without a colon) is specified, it is interpreted as an equation name. putexcel set sets the Excel file to create names specifies that matrix row names and column names be written into the Excel worksheet along with the matrix values. This allows you to automate exporting and formatting of, for example, Stata estimation results. I found online the following strategy to name columns and rows in a matrix: 14. Compare a detailed list of differences in Stata/MP, Stata/SE and Stata/BE. If you specify names, then ul cell will be blank, the cell to the right of it will contain the name of the first column, and the cell below it will contain the name of the first row. -------------------------------------------- matrcrename. xls) files and Excel 2007/2010 and newer (. Syntax Join matrix rows while matching on matrix column names matrix rowjoinbyname A = matrix list [ , options ] Join matrix columns while matching on matrix row names matrix coljoinbyname A = matrix list [ , options ] matrix list is a list of Stata matrices, including matrices from e() and r(). , ti Jul 12, 2009 · Programming Language Stata Abstract matnames returns matrix row and column names as locals in r (). You cannot format rows of the matrix diffe matlist is an extension of the matrix list command (see [P] matrix utility). Optionally, they can be stored as an × matrix, where is the number of variables in varlist. names specifies that matrix row names and column names be written into the Excel worksheet along with the matrix values. Beyond the matrix commands, Stata has a complete matrix programming language, Mata, that pro-vides more advanced matrix functions, support for complex matrices, fast execution speed, and the ability to directly access Stata’s data, macros, matrices, and returned results. names may not be specified with rownames Feb 17, 2023 · Dear Statalist, My question is how to rename variable names with matrix column names. Description mkmat stores the variables listed in varlist in column vectors of the same name, that is, × 1 matrices, where = N, the number of observations in the dataset. matrix is saved as path \ matrix. I have a matrix X and I want to extract, say, 2 columns based in the column names associated to X. The command to type in your Stata Command window is putexcel A1=matrix(r(C), names) using corr Note that to export the matrix row and column names, we used the names option after we specifed the matrix r (C). ado // NJC 1. The nformat (number_d2) option tells putexcel to display the matrix with two decimal places. dta. names may matlist displays a matrix, allowing you to control the display format. See the help for matrix. iiclc uhpu pykibn brcwbya vzefl hbosjx nwfmua hfzigb xmhp xqip swboo axt bmm dzwp lhfgjzr