MATLAB: How to change text in textfile with matlab

for loopMATLABtext file

Hi!

How can i change .txt file thas has a text like "Adam went to the store", change to "Adam_went_to_the_store" with a for-loop?

Thanks!

Best Answer

Refer to the documentation of fileread & regexp and Export to Text Data Files with Low-Level I/O.

The following code might help you to change a particular text:

Let's assume that the following content "Adam went to the store" is in a text file named textFile.txt

textChar = fileread("textFile.txt");
indices = regexp(textChar,' '); % get indices of the ' ' in textChar
textChar(indices) = '_'

If you want to do the same using for loop, then iterate through textChar (from above) to find ' ' and replace it with '_' .

Related Solutions

MATLAB: Find specific text in a text file

Please refer to the functions fileread & regexp.

Let's assume that the following content

"system

component1 |[ b,a,d, w,e,r ]| component2

endsystem"

is in a text file named textFile.txt then the following code might help you:

textChar = fileread("textFile.txt");
startIndex = regexp(textChar,'|[');
endIndex = regexp(textChar,']|');
requiredOutput = textChar(startIndex+1:endIndex-2)

MATLAB: Using the find function in a loop

The immediate cause for the error is simple, you already have a variable called datarecords and it's not a cell array. Since none of the variables you're using in your loop are predeclared you're either reusing whatever exists or creating them in the first step of the loop.

datarecords = {};
mydata = {};

before the loop would fix that error.

However the rest of the code doesn't make much sense. I very much doubt that importdata is going to return a structure when loading a text file, so your mydata{k}.textdata is probably an error as well.

k is either 1 or 4, never any other value, so it's unclear why it's used as an index. And if its only purpose is to break out of the loop then:

   while true
      %...
      if strcmp(Answer, 'No')
         break;
      end
   end

is better.

I think that rather than fixing that script, you'd be better off explaining better what you want to do and showing an example of the text file you want to load and telling us which part of that file you're interested in.

If you are loading text files, why don't you use readtable?

Best Answer

Related Solutions

MATLAB: Find specific text in a text file

MATLAB: Using the find function in a loop

Related Question