Constant block doesn't accept array

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madhan ravi
madhan ravi on 24 Aug 2022
Answered: Jim Riggs on 28 Oct 2022
Not sure why the constant block doesn;t give the output as array. Is there any to make it possible?

Accepted Answer

Paul on 25 Aug 2022
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.
madhan ravi
madhan ravi on 25 Aug 2022
Edited: madhan ravi on 25 Aug 2022
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 on 25 Aug 2022
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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More Answers (2)

Jim Riggs
Jim Riggs on 28 Oct 2022
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.

Abderrahim. B
Abderrahim. B on 24 Aug 2022
I understood that you want the output of the constant block to have the same size as the array in it.
Use the constant block from DSP System Toolbox/ Sources.
Hope this helps
Abderrahim. B
Abderrahim. B on 24 Aug 2022
Tried at my end.. multiplied the generated const array with its transpose and it worked just fine. What kind of calculations you re doing?

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