The error using "load" and "fgets" codes in MATLAB 2013a?

I just want to use "load" command and "fgets" command in same time.

fid is a txt file which contains the directories of 40 seperate file.

fid=

materialproperties/uniaxialelement1.txt

materialproperties/uniaxialelement2.txt

materialproperties/uniaxialelement3.txt

....

....

....

So i use fgets(fid) to get the directory of any file as

fgets(fid)= materialproperties/uniaxialelement2.txt

then I need the data of this file so i use" load" command

Read_Pr=load(fgets(fid))

this code work efficently in MATLAB 2014a but i have to run the code in MATLAB 2013a but i get an error.

So what can i do for running this code without any errors in MATLAB2013a?

Whats is difference in using "load" code?

[Stephen23]

@ugur ugur: please show us the complete error message. This means all of the red text.

[IB Ugur]

Error using load

Enable to read file 'materialproperties/uniaxialelement2.txt

': Invalid argument.

Error in Analyze (line 13)

Read_Pr=load(fgetl(fid));

This is the error message.

[Stephen23]

@ugur ugur: the error message gives the filename that you are trying to use, and you can clearly see that it includes a newline at the end:

... 'materialproperties/uniaxialelement2.txt
'

This is exacty as I already described in my answer, together with the solution. If you used my answer then there would be no newline character at the end.

PS: I doubt that the error message actually says "Enable to read file".

PPS: remember to accept my answer (it answers your question) and also answers to your other questions:

https://www.mathworks.com/matlabcentral/answers/437581-how-can-i-use-character-in-a-string

[IB Ugur]

When i write Read_Pr=load('materialproperties/uniaxialelement2.txt') in stead of Read_Pr=load(fgets(fid)), it works and there is no error.

But i have to use Read_Pr=load(fgets(fid)) command because this process is in a loop and repeats 20 times in a iteration. By the way, these two code serve the same purpose but why second code doesn't work although first did??

Answer 1

[Stephen23]

Use fgetl, not fgets:

Read_Pr = load(fgetl(fid))
%                  ^

As its help clearly states, fgets includes the newlines at the end of the line (so this will not be a valid filename) but fgetl removes the newlines (giving a valid filename).

[IB Ugur]

Thank you so much. one letter (fgetL =>fgetS) drove me crazy.

Thank for your vital help :)