Facing below problem while linking CoolProp with MATLAB

pyversion

version: '2.7'

executable: 'C:\Users\Shehryar Ishaque\Anaconda2\python.EXE'

library: 'C:\Users\Shehryar Ishaque\Anaconda2\python27.dll'

home: 'C:\Users\Shehryar Ishaque\Anaconda2'

isloaded: 0

>> [v,e] = pyversion; system([e,' -m pip install --user -U CoolProp'])

'C:\Users\Shehryar' is not recognized as an internal or external command,

operable program or batch file.

ans =

1

Answer 1

[Walter Roberson]

[v,e] = pyversion;
cmd = sprintf('"%s" -m pip install --user -U CoolProp', e);
system(cmd)

[NAVEED ULLAH]

Thankyou for always helping,

the problem erased. but when i calculate humid properties is give me error like that , will you please guide how to fix

[Walter Roberson]

You need py.Coolprop.Coolprop.HAPropsSI

[NAVEED ULLAH]

can you please guide me to get py.Coolprop.Coolprop.HAPropsSI resolve the issue

[Walter Roberson]

http://www.coolprop.org/apidoc/CoolProp.CoolProp.html documents CoolProp.CoolProp.HAPropsSI so once (recent enough) CoolProp is installed,

T = py.CoolProp.CoolProp.HAPropsSI('T', 'P', '101325', 'H', H, 'R', 1.0)

Answer 2

[Shanmukha Voggu]

Hi naveed,

system(command) calls the operating system to execute the specified command.

If you want to run multiple commands, use && between consecutive commands for windows

Refer to documentation of system

Hope this helps!

[Walter Roberson]

[v,e] = pyversion;
array = [e,' -m pip install --user -U CoolProp']

array = '/usr/bin/python -m pip install --user -U CoolProp'

whos array

  Name       Size            Bytes  Class    Attributes

  array      1x49               98  char               

array

array = '/usr/bin/python -m pip install --user -U CoolProp'

This tells us that the result of [e,' -m pip install --user -U CoolProp'] is a character vector, as required by system() .

The problem is not in the fact that the character vector is constructed instead of being static. The constructed character vector is as valid for the purpose of system() as if the content of the constructed character vector had been hard-coded in a system() call.

The problem is that the executable name happens to have spaces in it, and Windows is treating those spaces as the end of the command to execute, with the parts after the space being treated as parameters or options to the call. The cure is to ensure that the path to the executable is quoted when it goes into system()

[Shanmukha Voggu]

Thanks for clarification.

[NAVEED ULLAH]

thank you