Stateflow matrix usage error.

Question

Chida Matada 2015-8-4

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https://ww2.mathworks.cn/matlabcentral/answers/232348-stateflow-matrix-usage-error

评论： Chida Matada 2015-8-5

Hello, I tried looking through the solutions posted in the forum but could not find the one matching my issue.

In model explorer I have declared a data as of size [2 1]. And like it says in the examples that if you want to initialize to 0 then you don have to specify.

Now when I try accessing this data in my stateflow chart as data[1][1]=0; The following error pops up in the build.

Parse error: Unbalanced or unexpected parenthesis or bracket.

State 'Start' "[1][1]=2;"

I need to be able to access this array in a C file I am linking to.

Can some one tell me what I am doing wrong here. Thanks.

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Answer 1

Sebastian Castro 2015-8-4

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https://ww2.mathworks.cn/matlabcentral/answers/232348-stateflow-matrix-usage-error#answer_188252

A few things

That exact error message comes up with your chart's action language is MATLAB, which is the new default since R2014a. If you want to use the C action language, you want to go to "File > Model Properties > Chart Properties" and change the language there.
You defined "data" as a 2-by-1, but recall that in the C action language the first index is 0. Therefore, the second index cannot be a "1", which denotes a second column which does not exist.

- Sebastian