保存當前工作空間的所有變數到檔案名稱制定的檔案中，此檔案後綴名通常為mat。如果不指定檔案名稱變數，則會默認保存到matlab.mat這個檔案中的一種運算符法。
基本介紹
- 中文名：save函式
- 外文名：function
- 類別：數學名詞
- 專業方向：計算機函式
- 發明時間：20世紀
函式編程,主要公式,
函式編程
SAVE Save workspace variables to disk.
SAVE FILENAME saves all workspace variables to the binary "MAT-file"
named FILENAME.mat. The data may be retrieved with LOAD. If FILENAME
has no extension, .mat is assumed.
SAVE, by itself, creates the binary "MAT-file" named 'matlab.mat'.
SAVE FILENAME X saves only X.
SAVE FILENAME X Y Z saves X, Y, and Z. The wildcard '*' can be used to
save only those variables that match a pattern.
SAVE FILENAME -REGEXP PAT1 PAT2 can be used to save all variables
matching the specified patterns using regular expressions. For more
information on using regular expressions, type "doc regexp" at the
command prompt.
SAVE FILENAME -STRUCT S saves the fields of the scalar structure S as
individual variables within the file FILENAME.
SAVE FILENAME -STRUCT S X Y Z saves the fields S.X, S.Y and S.Z to
FILENAME as individual variables X, Y and Z.
SAVE FILENAME ... -APPEND adds the variables to an existing file
(MAT-file only).
Format Options:
SAVE ... -ASCII uses 8-digit ASCII form instead of binary regardless
of file extension.
SAVE ... -ASCII -DOUBLE uses 16-digit ASCII form.
SAVE ... -ASCII -TABS delimits with tabs.
SAVE ... -ASCII -DOUBLE -TABS 16-digit, tab delimited.
SAVE ... -MAT saves in MAT format regardless of extension.
Version Compatibility Options:
The following options enable you to save your workspace data to a
MAT-file that can then be loaded into an earlier version of MATLAB.
The resulting MAT-file supports only those data items and features
that were available in this earlier version of MATLAB. (See the
second table below for what is supported in each version.)
Command Option | Saves a MAT-File That You Can Load In
主要公式
-----------------+----------------------------------------------
SAVE ... -V7.3 | Version 7.3 or later
-----------------+----------------------------------------------
SAVE ... -V7 | Versions 7.0 through 7.2 (or later)
-----------------+----------------------------------------------
SAVE ... -V6 | Versions 5 and 6 (or later)
-----------------+----------------------------------------------
SAVE ... -V4 | Versions 1 through 4 (or later)
To make one of these options the default for all of your MATLAB
sessions, use the Preferences dialog box. In the MATLAB File menu,
select Preferences. Then, in the Preferences dialog box, click
General and then MAT-Files.
MATLAB Versions | Data Items or Features Supported
-----------------+----------------------------------------------
4 and earlier | Support for 2D double, character, and sparse
| arrays
-----------------+----------------------------------------------
5 and 6 | Version 4 capability plus support for
| ND arrays, structs, and cells
-----------------+----------------------------------------------
7.0 through 7.2 | Version 6 capability plus support for data
| compression and Unicode character encoding
-----------------+----------------------------------------------
7.3 and later | Version 7.2 capability plus support for
| data items greater than or equal to 2GB
Examples for pattern matching:
save fname a* % Save variables starting with "a"
save fname -regexp \d % Save variables containing any digits
Examples for specifying filename and variables:
save mydata.mat v1 % Use with literal filename
save 'my data file.mat' v1 % Use when filename has spaces
save(savefile, 'v1') % Use when filename is stored in a variable
