Selection of 2 Dimensional variable Parameters in Sensitivity analyzer

Hi All,

How we can Select Parameters which are not scalar in Sensitivity analyzer.Mine is 2 dimensional array and have four such variables.

first column is time in seconds and second colmn shows the values.

Eg: Cost[60 19.9,120 19.88,....]

i tried the below formats:

Cost.Value(1,1)

Cost.Value[1 1]

but it didnt select the values from the 2 dimensional array.

Kindly help how to specify expression for that.

Answer 1

[Sachin]

Hi @NN,

As per my understanding, you are facing issue while selecting Parameters in Sensitivity Analyzer. Referring the following information might be of good help to you.

According to your Eg : Cost[60 19.9,120 19.88,....]

Looks like your array is not 2-D . To define Array correctly you need to add a semicolon(;) after 1st row. You need to change comma(,) with semicolon(;).

Correct way to define 2-D Array - Cost[60 19.9 ;120 19.88]

Refer the following page for more information about array and matrix -

https://www.mathworks.com/help/matlab/learn_matlab/matrices-and-arrays.html

You can also check this by generating sample parameter. For example -

R = param.Continuous('R',[60 19.9;120 19.88])

 
R =
 
       Name: 'R'
      Value: [2×2 double]
    Minimum: [2×2 double]
    Maximum: [2×2 double]
       Free: [2×2 logical]
      Scale: [2×2 double]
       Info: [2×2 struct]

 
1x1 param.Continuous
 

R.Value

ans = 2×2

60.0000 19.9000 120.0000 19.8800

R.Value(1,1)

ans = 60

isscalar(R.Value)

ans = logical
   0

For more information Generate Parameter for Sensitivity Analysis, refer to the following page –

Generate Parameter Samples for Sensitivity Analysis - MATLAB & Simulink (mathworks.com)

Regards

Sachin