Stata 15 help for export excel

[D] import excel -- Import and export Excel files

Syntax

Load an Excel file

import excel [using] filename [, import_excel_options]

Load subset of variables from an Excel file

import excel extvarlist using filename [, import_excel_options]

Describe contents of an Excel file

import excel [using] filename, describe

Save data in memory to an Excel file

export excel [using] filename [if] [in] [, export_excel_options]

Save subset of variables in memory to an Excel file

export excel [varlist] using filename [if] [in] [, export_excel_options]

import_excel_options Description ------------------------------------------------------------------------- sheet("sheetname") Excel worksheet to load cellrange([start][:end]) Excel cell range to load firstrow treat first row of Excel data as variable names case(preserve|lower|upper) preserve the case (the default) or read variable names as lowercase or uppercase when using firstrow allstring[("format")] import all Excel data as strings; optionally, specify the numeric display format clear replace data in memory

locale("locale") specify the locale used by the workbook; has no effect on Microsoft Windows ------------------------------------------------------------------------- allstring("format") and locale() do not appear in the dialog box.

export_excel_options Description ------------------------------------------------------------------------- Main sheet("sheetname") save to Excel worksheet cell(start) start (upper-left) cell in Excel to begin saving to sheetmodify modify Excel worksheet sheetreplace replace Excel worksheet firstrow(variables|varlabels) save variable names or variable labels to first row nolabel export values instead of value labels keepcellfmt when writing data, preserve the cell style and format of existing worksheet replace overwrite Excel file

Advanced datestring("datetime_format") save dates as strings with a datetime_format missing("repval") save missing values as repval

locale("locale") specify the locale used by the workbook; has no effect on Microsoft Windows ------------------------------------------------------------------------- locale() does not appear in the dialog box.

extvarlist specifies variable names of imported columns. An extvarlist is one or more of any of the following:

varname varname=columnname

Example: import excel make mpg weight price using auto.xlsx, clear imports columns A, B, C, and D from the Excel file auto.xlsx.

Example: import excel make=A mpg=B price=D using auto.xlsx, clear imports columns A, B, and D from the Excel file auto.xlsx. Column C and any columns after D are skipped.

Menu

import excel

File > Import > Excel spreadsheet (*.xls;*.xlsx)

export excel

File > Export > Data to Excel spreadsheet (*.xls;*.xlsx)

Description

import excel loads an Excel file, also known as a workbook, into Stata. import excel filename, describe lists available sheets and ranges of an Excel file. export excel saves data in memory to an Excel file. Excel 1997/2003 (.xls) files and Excel 2007/2010 (.xlsx) files can be imported, exported, and described using import excel, export excel, and import excel, describe.

import excel and export excel are supported on Windows, Mac, and Linux.

import excel and export excel look at the file extension, .xls or .xlsx, to determine which Excel format to read or write.

For performance, import excel imposes a size limit of 40 MB for Excel 2007/2010 (.xlsx) files. Be warned that importing large .xlsx files can severely affect your machine's performance.

import excel auto first looks for auto.xls and then looks for auto.xlsx if auto.xls is not found in the current directory.

The default file extension for export excel is .xls if a file extension is not specified.

Options for import excel

sheet("sheetname") imports the worksheet named sheetname in the workbook. The default is to import the first worksheet.

cellrange([start][:end]) specifies a range of cells within the worksheet to load. start and end are specified using standard Excel cell notation, for example, A1, BC2000, and C23.

firstrow specifies that the first row of data in the Excel worksheet consists of variable names. This option cannot be used with extvarlist. firstrow uses the first row of the cell range for variable names if cellrange() is specified. import excel translates the names in the first row to valid Stata variable names. The original names in the first row are stored unmodified as variable labels.

case(preserve|lower|upper) specifies the case of the variable names read when using the firstrow option. The default is case(preserve), meaning to preserve the variable name case. Only the ASCII letters in names are changed to lowercase or uppercase. Unicode characters beyond ASCII range are not changed.

allstring[("format")] forces import excel to import all Excel data as string data. You can specify the numeric display format used to convert the numeric data to string using the optional argument format. See [D] format.

clear clears data in memory before loading data from the Excel workbook.

The following option is available with import excel but is not shown in the dialog box:

locale("locale") specifies the locale used by the workbook. You might need this option when working with extended ASCII character sets. This option has no effect on Microsoft Windows. The default locale is UTF-8.

Options for export excel

+------+ ----+ Main +-------------------------------------------------------------

sheet("sheetname") saves to the worksheet named sheetname. If there is no worksheet named sheetname in the workbook, a new sheet named sheetname is created. If this option is not specified, the first worksheet of the workbook is used.

cell(start) specifies the start (upper-left) cell in the Excel worksheet to begin saving to. By default, export excel saves starting in the first row and first column of the worksheet.

sheetmodify exports data to the worksheet without changing the cells outside the exported range. sheetmodify cannot be combined with sheetreplace or replace.

sheetreplace clears the worksheet before the data are exported to it. sheetreplace cannot be combined with sheetmodify or replace.

firstrow(variables|varlabels) specifies that the variable names or the variable labels be saved in the first row in the Excel worksheet. The variable name is used if there is no variable label for a given variable.

nolabel exports the underlying numeric values instead of the value labels.

keepcellfmt specifies that, when writing data, export excel should preserve the existing worksheet's cell style and format. By default, export excel does not preserve a cell's style or format.

replace overwrites an existing Excel workbook. replace cannot be combined with sheetmodify or sheetreplace.

+----------+ ----+ Advanced +---------------------------------------------------------

datestring("datetime_format") exports all datetime variables as strings formatted by datetime_format. See [D] datetime display formats.

missing("repval") exports missing values as repval. repval can be either string or numeric. Without specifying this option, export excel exports the missing values as empty cells.

The following option is available with export excel but is not shown in the dialog box:

locale("locale") specifies the locale used by the workbook. You might need this option when working with extended ASCII character sets. The default locale is UTF-8.

Remarks/Examples

To demonstrate the use of import excel and export excel, we will first load auto.dta and export it as an Excel file named auto.xls:

. webuse auto (1978 Automobile Data)

. export excel auto, firstrow(variables) file auto.xls saved

Now we can import from the auto.xls file we just created, telling Stata to clear the current data from memory and to treat the first row of the worksheet in the Excel file as variable names:

. import excel auto.xls, firstrow clear . describe

Contains data obs: 74 vars: 12 size: 3,922 ----------------------------------------------------------------------- storage display value variable name type format label variable label ----------------------------------------------------------------------- make str17 %17s make price int %10.0g price mpg byte %10.0g mpg rep78 byte %10.0g rep78 headroom double %10.0g headroom trunk byte %10.0g trunk weight int %10.0g weight length int %10.0g length turn byte %10.0g turn displacement int %10.0g displacemen gear_ratio double %10.0g gear_ratio foreign str8 %9s foreign ----------------------------------------------------------------------- Sorted by: Note: Dataset has changed since last saved.

We can also import a subrange of the cells in the Excel file:

. import excel auto.xls, cellrange(:D70) firstrow clear . describe

Contains data obs: 69 vars: 4 size: 1,449 ----------------------------------------------------------------------- storage display value variable name type format label variable label ----------------------------------------------------------------------- make str17 %17s make price int %10.0g price mpg byte %10.0g mpg rep78 byte %10.0g rep78 ----------------------------------------------------------------------- Sorted by: Note: Dataset has changed since last saved.

Both .xls and .xlsx files are supported by import excel and export excel. If a file extension is not specified with export excel, .xls is assumed, because this format is more common and is compatible with more applications that also can read from Excel files. To save the data in memory as a .xlsx file, specify the extension:

. webuse auto, clear (1978 Automobile Data)

. export excel auto.xlsx file auto.xlsx saved

To export a subset of variables and overwrite the existing auto.xls Excel file, specify a variable list and the replace option:

. export excel make mpg weight using auto, replace file auto.xls saved

Video example

Import Excel data into Stata

Technical note: Excel data size limits

For an Excel .xls-type workbook, the worksheet size limits are 65,536 rows by 256 columns. The string size limit is 255 characters.

For an Excel .xlsx-type workbook, the worksheet size limits are 1,048,576 rows by 16,384 columns. The string size limit is 32,767 characters.

Technical note: Dates and times

Excel has two different date systems, the "1900 Date System" and the "1904 Date System". Excel stores a date and time as an integer representing the number of days since a start date plus a fraction of a 24-hour day.

In the 1900 Date System, the start date is 00Jan1900; in the 1904 Date System, the start date is 01Jan1904. In the 1900 Date System, there is another artificial date, 29feb1900, besides 00Jan1900. import excel translates 29feb1900 to 28feb1900 and 00Jan1900 to 31dec1899.

See Using dates and times from other software in [D] datetime for a discussion of the relationship between Stata datetimes and Excel datetimes.

Technical note: Mixed data types

Because Excel's data type is cell based, import excel may encounter a column of cells with mixed data types. In such a case, the following rules are used to determine the variable type in Stata of the imported column.

If the column contains at least one cell with nonnumerical text, the entire column is imported as a string variable.

If an all-numerical column contains at least one cell formatted as a date or time, the entire column is imported as a Stata date or datetime variable. import excel imports the column as a Stata date if all date cells in Excel are dates only; otherwise, a datetime is used.

Stored results

import excel filename, describe stores the following in r():

Macros r(N_worksheet) number of worksheets in the Excel workbook r(worksheet_#) name of worksheet # in the Excel workbook r(range_#) available cell range for worksheet # in the Excel workbook


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