Matlab Coder coder.resize and coder.typeof unsupported for code generation

Hello,

I was wondering why these functions as well as a couple are unsupported seeing as they are part of the Matlab coder toolbox itself, here is the error message I am getting;

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The function 'typeof' is not supported for standalone code generation. See the documentation for coder.extrinsic to learn how you can use this function in simulation.

Function 'foo.m' (#404.3235.3258), line 45, column 48:
"coder.typeof(char(zeros(1, 7)))"
Launch diagnostic report.

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Is this something I am doing wrong or is this a bug the coder itself

Regards

Daniel

[Arnab De]

They are indeed unsupported for code generation. These functions are only used to specify input types for codegen. Do you have any other use case for these functions?

[Daniel Clarke]

I was trying resize some values, or assert the fact that a variable has a fixed size, as at the moment Im trying to wrestle with the the following error

Dimension 1 of field 'x' is fixed on the left-hand side but varies on the right ([3 x 1] ~= [:? x :?]).

Any ideas?

[Arnab De]

Can you please paste a representative code snippet that reproduces your problem?

[Daniel Clarke]

so we have

TtrajectoryOutput.VendOfWellCoords = [0 0 0]';
VendOfWellCoords  = zeros(3,1);

coder.ceval('DRILL_ONE_STEP', ... coder.ref(VendOfWellCoords));  %#ok<ASGLU>

TtrajectoryOutput.VendOfWellCoords = VendOfWellCoords;

where we know at the start that VendOfWellCoords is a 3x1 matrix, and that its struct field counter part are the same size, but when the value is picked after our call the dll function I get the error

Dimension 1 of field 'VendOfWellCoords' is fixed on the left-hand side but varies on the right ([3 x 1] ~= [:? x 1]).

[Arnab De]

I do not see any problem with the code you pasted here. Most probably, some other part of the code is causing the problem. Can you open the report and check where exactly the size mismatch is happening?

Answer 1

[Fred Smith]

coder.resize and coder.typeof are used to construct and manipulate types that are passed as inputs to the codegen command. They cannot be used from the MATLAB Code that you are generating code from.

-Fred