How can I call a python-Function in Matlab with an Array as input and return Value?

Hello Community

I am re-Organizing Arrays in Matlab. Since I am a python-Person, I wrote a program that simply rearranges the order of the Array-Content i created in matlab. I need the re-organized Array again in Matlab so I would like to do the following:

Dummy code all within matlab:

1 Matlab-createdArray [randomsize]

2 NewOrderArray = py.Rearrange(Matlab-CreatedArray)

3... do whatever with my newOrderArray

I will attach my python idea aswell, maybe one of you can help me to convert that into Matlab and dont call python in the end, that be the smoother way I guess.

For those who care, the idea of my re-arrange is to basically re-order the array in a Middle-First way (like middle-out sort but backwards). So an order of 1,2,3,4,5 becomes 1,5,3,2,4 and so on.

I am happy for every input, thanks a lot in advance!

 def fundamentalfunc( num1 , num2 ):
    mid = int( ( num1+num2 ) / 2 )
    return [num1, mid , mid+1, num2], mid  

def layerGenerator( whatImReallyInterestedIn, previousLayer ):
    newLayer= [ ]
    for i in range(0, len( previousLayer ), 2):
        dummy,element = fundamentalfunc(previousLayer[ i ],previousLayer[ i+1 ] )
        whatImReallyInterestedIn.append( element )
        newLayer.extend( dummy )
    return newLayer

def uniquifyer( whatImReallyInterestedIn, num2 ):
    consecutiveList = list( range( 1, num2+1 ) )
    simplifiedList = [ ]
    for i in range( 0, len( whatImReallyInterestedIn ) ):
        focus = whatImReallyInterestedIn[i]
        for j in range( 0,len( consecutiveList ) ):
                if focus == consecutiveList[j]:
                        simplifiedList.append( consecutiveList[ j ] )
                        consecutiveList.pop( j )
                        break                  
    return simplifiedList

num2= 20
whatImReallyInterestedIn = [ ]
newLayer = [1, num2]
while len(whatImReallyInterestedIn) < num2:
    newLayer = layerGenerator( whatImReallyInterestedIn, newLayer )
    whatImReallyInterestedIn = uniquifyer( whatImReallyInterestedIn, num2 )

print(whatImReallyInterestedIn)

Answer 1

[Deepak Meena]

Hey Wilhelm,

My understanding is that you want to import the functionality of a python function. It's very common practise and very easy to use to as well.

From the MATLAB command prompt, add the current folder to the Python search path.

if count(py.sys.path,'') == 0 
    insert(py.sys.path,int32(0),''); 
end 

Consider the following example to use python functionality in MATLAB:

N = py.list({'Jones','Johnson','James'}) 
 

N = Python list with no properties. ['Jones', 'Johnson', 'James']

Similarly in this way you can create your python array/list in MATLAB.

Now let's suppose your file name is myfile.py and code structure is like this:

myfile.py

def Rearrange(OldArray): 
     % your alogorithm  
     return NewArray 

Now you can call this functionas in MATLAB:

     names = py.myfile.Rearrange(OldArray); 

Here Names will also be the Python list/array.

Hope this clear your doubt. For more detail refer to this document