Using 'OR' or 'ELSEIF' with a string

Hi, I have a basic question. I am reading a file named as Basefilename="Filenameversion1.production_time.improvement_date.time_frame.hdf".

The code is not reading files from a folder containing different versions i.e "Filenameversion2......hdf", "Filenameversion3......hdf".

Code only reads filename mentioned in Basefilename.The remaining filename is same only version name is changed.

How can i do modification so that matlab reads file even if 'version' is changed.

Thanks alot

Answer 1

[Image Analyst]

The answer for this, along with lots of other good stuff, is in the FAQ: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Answer 2

[Star Strider]

I am not certain that I understand what you want to do, but this may be one approach:

ver_nr = 2;
Basefilename=sprintf('Filenameversion%d.production_time.improvement_date.time_frame.hdf', ver_nr)

produces:

Basefilename = Filenameversion2.production_time.improvement_date.time_frame.hdf

Is that what you want to do?

[JB]

Yes,something similar. By this method i have to update ver_nr everytime,is there any way i dont need to change it..?

[JB]

I have modified the basefilename as:

Basefilename =Filenameversion%d.production_time.improvement_date.%s.hdf

Using %d it does not scan for time frame(%s is scaning time) i,e processing is as: Filenameversion1.production_time.improvement_date

[Star Strider]

First, you can define ‘ver_nr’ as a loop index variable. If the numbers are discontinuous, you can define them as a specific vector, for example: for ver_nr = [1 2 5 8 10] as the start of the loop.

Second I do not understand what the ‘%s’ refers to or what you want to do with it. That was not part of your original post.

[JB]

%s is scaning time_frame ,as time_frame is different for every file Basefilename="Filenameversion1.production_time.improvement_date.time_frame.hdf"

[JB]

Is there a way to use 'or' or 'elseif' for e.g:

if Basefilename="Filenameversion1.production_time.improvement_date.time_frame.hdf"

else if

Basefilename="Filenameversion2.production_time.improvement_date.time_frame.hdf"

[Star Strider]

How do the scanning time_frame and version number relate?

I am now lost. I have no idea what you are doing or what you want to do.

[Image Analyst]

No, you can either use numbers in the "if" test (like if num1==num2), or you can compare two strings with string functions like strcmp(str1, str2), strcmpi(), or strfind().

[JB]

In simple words i want the following,

if Basefilename="Filenameversion1.production_time.improvement_date.time_frame.hdf"

else if

Basefilename="Filenameversion2.production_time.improvement_date.time_frame.hdf"

Sorry for inconvience.. my bad..

[Star Strider]

I still don’t understand, but if you want to do comparisons with string variables, use strcmpi, strncmpi, or related functions (links to those in and at the end of those pages).

[Image Analyst]

A comparison would have == not =. So I don't know if you're wanting to do

if Basefilename == "Filenameversion1.production_time.improvement_date.time_frame.hdf"
    % Some code to do if this is true.
elseif Basefilename == "Filenameversion2.production_time.improvement_date.time_frame.hdf"
    % Some code to do if this is true.
end

Or if you're trying to do

if num1 == num2
  % Assign Basefilename 
  Basefilename = "Filenameversion1.production_time.improvement_date.time_frame.hdf"
else
  % Assign Basefilename 
  Basefilename = "Filenameversion2.production_time.improvement_date.time_frame.hdf"      
end

Which is it? Or is it neither?