Constant block doesn't accept array

Question

madhan ravi 2022-8-24

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https://ww2.mathworks.cn/matlabcentral/answers/1784985-constant-block-doesn-t-accept-array

回答： Jim Riggs 2022-10-28

采纳的回答： Paul

Not sure why the constant block doesn;t give the output as array. Is there any to make it possible?

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Answer 1

Paul 2022-8-25

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https://ww2.mathworks.cn/matlabcentral/answers/1784985-constant-block-doesn-t-accept-array#answer_1032690

What is the value of A in the base workspace? Or whatever workspace it lives in.

Note that “A” in the From and GoTo blocks has nothing to do with A in the Constant block.

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madhan ravi 2022-8-25

编辑：madhan ravi 2022-8-25

Yes , I am aware of it, is there a way possible to use the output in the constant block? It has to take place within the SIMULINK file/model

Paul 2022-8-25

In the model in the Question, what is the entry for the "Constant value" in the block parameters for the constant block that's feeding Display 1? It looks like it should be 'A', and A must be a variable defined in the base workspace or model workspace (or a mask workspace if that block is masked), and the value of A is 1. That output of 1 is coming from somewhere. But maybe this discussion isn't really relevant to what you want to do.

Do you want the constant block with 'A' to take on the value 2:3 when the simulation is running? If so, why is that second constant block needed at all. Just route the output of the 2:3 block to wherever it needs to go.

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Answer 2

Jim Riggs 2022-10-28

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https://ww2.mathworks.cn/matlabcentral/answers/1784985-constant-block-doesn-t-accept-array#answer_1086593

Yes, you can save the value to the workspace and reference it in a constant block. As @Paul points out, the label on the Goto block has nothing to do with the workspace variable name.

The "To Workspace" block saves the variable in structure "Out", and has several options for the variable format.

Below, I show a reference to variable "B" saved to the workspace as an array and as a Time Series. This option is selected in the properties of the "To Workspace" block.