Calling python function that calls another file from Matlab

Hello,

My python file all_functions.py has a function of

import vib_calc as vib

def calc_cac(a):
    formula_involving vib.anotherfunc(a[1])
    return press

This I can call from matlab as py.all_functions.calc_cac(input). The problem is, calc_cac(a) also uses a command "import vib_calc as vib" which is basically using another vib_calc.py file as import as it has another loads of functions inside it, that are required for calc_cac(input).

Hence my former call from matlab of

py.all_functions.calc_cac(input)

throws an error of

Error using vib_calc>supportplates
Python Error: TypeError: 'float' object cannot be interpreted as an integer.

I am guessing this is because I have not informed matlab about the whereabouts of vib_calc file, but I am not sure how can I do this?

Answer 1

[Daniele Sportillo]

Hi,

the problem may be related to the type of the "input" variable, which is by default float.

Try calling your python function with the argument cast to integer:

py.all_functions.calc_cac(int16(input))

[Atul]

The input is actually of the type,

input =

27.0000 21.0000 3.0000 384.0000 3.0000 3.0000 4.0000 1.0350 0.0310 0.1850

where the first 7 indices should be integers and the rest as floats.

Seems I cannot get mixed data type vector after doing

inp_new = [int16(input(1:7)), double(input(8:10))]

[Daniele Sportillo]

Right, this should work:

inp_new = py.list(int16(input(1:7))); % Create a list with the first 7 elements cast to int
inp_new.extend(input(8:10)); % Append the last 3 elements as double
py.all_functions.calc_cac(inp_new)

[Atul]

It did. Thanks.