Error in Using set_param

2014 7 14
2 个回答
回答已采纳
更新时间：2019 12 13
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0 个投票

I've not been able to set the consant in the "constant" block. I used: set_param('dummy/Constant','x',50) but kept getting eroor "Constant block does not have a parameter named 'x'". 'dummy' is the model name.
Thanks.

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William
William 2014-7-14

0 个投票

I still got error: "Invalid setting in Constant block 'Constant' for parameter 'Value'. 'x' is in the place of the 'constant' block where the numeric value is given.

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William
William 2014-7-15
>> set_param('dummy/Constant','X',50) Constant block does not have a parameter named 'X'
William
William 2014-7-15
>> set_param('dummy/Constant','x','50') Constant block does not have a parameter named 'x'
Brian B
Brian B 2014-7-15
The error is telling you what you need to know: There is no parameter named 'x'. The parameter is called 'Value'. Try EXACTLY THIS LINE:
set_param('dummy/Constant','Value','50')
William
William 2014-7-15
how can I replace the constant value with a variable (x in this case) & set x to the value I want? Thanks (I got with it worked with your suggestion above).
Brian B
Brian B 2014-7-15
If x is a variable in the workspace, then you can use
set_param('dummy/Constant','Value','x')

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更多回答（1 个）

Brian B
Brian B 2014-7-14

0 个投票

Try
set_param('dummy/Constant','Value','50')
Note that the value is also a string.

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William
William 2014-7-14
I still got error: "Invalid setting in Constant block 'Constant' for parameter 'Value'. 'x' is in the place of the 'constant' block where the numeric value is given.
Brian B
Brian B 2014-7-14
Can you post the exact command that you tried? If I run
set_param('untitled/Constant','Value',50)
I get the error you describe. If I replace 50 with '50', I do not get an error.
William
William 2014-7-15
how can I replace the constant value with a variable (x in this case) & set x to the value I want? Thanks.
Fuli Wang
Fuli Wang 2019-12-13
x=50;
set_param('untitled/Constant','Value',num2str(x));

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