How can I pass the following visa TCPIP constructor by IP address variable.

The expression:

PS1_obj = visa('NI','TCPIP0::192.168.200.50::inst0::INSTR')...it works as a literal expression but when I try to pass in a variable for the IP address the visa constructor errors.

Example:

ipaddr = '192.168.200.50'

PS1_obj = visa('NI','TCPIP0::%s::inst0::INSTR',ipaddr)...with variable declaration for the IP address.

Error using visa (line 293)

Invalid property: '192.168.200.50' specified.

Answer 1

[Walter Roberson]

Use sprintf to construct the character vector. The visa() function itself has no provision for substitution of strings.

[Walter Roberson]

PS1_obj = visa('NI', sprintf('TCPIP0::%s::inst0::INSTR',ipaddr) )

Answer 2

[Steve Kulakowski]

Thanks for the response, I tried that but it didn't work. I didn't spend alot of time on it, so let me double check the string.....