MATLAB Function Reference Volume 1: A - E - Bad Request

evalin
2evalin
Purpose Execute a string containing a MATLAB expression in a workspace
Syntax evalin(ws,expression)
[a1,a2,a3,...] = evalin(ws,expression)
evalin(ws,expression,catch_expr)
Description evalin(ws,expression) executes expression, a string containing any valid
MATLAB expression, in the context of the workspace ws. ws can have a value
of 'base' or 'caller' to denote the MATLAB base workspace or the workspace
of the caller function. You can construct expression by concatenating
substrings and variables inside square brackets:
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expression = [string1,int2str(var),string2,...]
[a1,a2,a3,...] = evalin(ws,expression) executes expression and
returns the results in the specified output variables. Using the evalin output
argument list is recommended over including the output arguments in the
expression string:
evalin(ws,'[a1,a2,a3,...] = function(var)')
The above syntax avoids strict checking by the MATLAB parser and can
produce untrapped errors and other unexpected behavior.
evalin(ws,expression,catch_expr) executes expression and, if an error is
detected, executes the catch_expr string. If expression produces an error, the
error string can be obtained with the lasterr function. This syntax is useful
when expression is a string that must be constructed from substrings. If this
is not the case, use the try...catch control flow statement in your code.
Remarks The MATLAB base workspace is the workspace that is seen from the MATLAB
command line (when not in the debugger). The caller workspace is the
workspace of the function that called the M-file. Note, the base and caller
workspaces are equivalent in the context of an M-file that is invoked from the
MATLAB command line.
Examples This example extracts the value of the variable var in the MATLAB base
workspace and captures the value in the local variable v:
v = evalin(‘base’,’var’);