why the syms command is not working on my matlab ?

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Stany Natalia
Stany Natalia 2017-9-11
移动：Walter Roberson 2025-11-16，6:24
Error using sym Error: File: sym.m Line: 176 Column: 35 Unexpected MATLAB expression.
Error in syms (line 77) toDefine = sym(zeros(1, 0));
Error in metnum1a (line 1) syms x
my syms used to work fine, but recently this error always come out and i don't know how to fix it. any suggestion ? Thanks a lot :)

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回答（1 个）

Steven Lord
Steven Lord 2017-9-11
Make sure you are using the sym function from Symbolic Math Toolbox, not another function named sym that you wrote or downloaded from somewhere else.
which -all sym
After that, if you are using the function from the toolbox check that you haven't accidentally modified the sym function from the toolbox. Edit it and see if there is a red square in the upper-right corner of the Editor box. If there is look for a red line in the gutter below that square and see if there is one on or near line 176. If so correct the problem it describes.

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