MATLAB: Reading and writing a 2-column table of strings to text file

saving an array of stringstext file

I have a novice question on saving to and loading from text files. I'm new to Matlab, so I need very simple step-by-step instructions on how to do this. Perhaps it is in a tutorial somewhere, that would be fine if someone could point me to it.

I want to save and load values as a text file with two columns. There is a mix of strings and numbers, so everything could be converted to strings before saving. That would be fine.

The first column is a list of parameter names, the second is the value of these parameters.

For example , the first column with three rows might be "parameter name 1", "parameter name 2", "parameter name 3". The second column of three rows might be "100", "200", "Off".

I would like to create this text file, and be able to load and interpret it again. Thank you!

Best Answer

You can find many ways by following the links below.

https://www.mathworks.com/help/matlab/text-files.html

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MATLAB: Create a 2-column matrix, random set of weight

To answer your questions:

Did you create the column-matrix correctly? Sure. It works :). There are many ways to create matricies. The way you have done it is an acceptable way. A few other ways to make a vector:

kg = linspace(1,2,2)  % This makes a 1x2 matrix. 
% To convert it to a vector, you would still have to use the apostrophe (')

kg = 1 : 1 : 2;       % This makes a 1x2 matrix.
% To convert it to a vector, you would still have to use the apostrophe (')
kg = [1;2];           % This makes a 2x1 matrix. YOU DO NOT HAVE TO USE AN APOSTROPHE (')!

2. Should you create a random set of weights with a+(b)*rand(1,2)? Sure! Remember that you will have to declare your variables a and b but that will work. This will give you a 1x2 matrix again, if you wanted to start with a 2x1 matrix (so you don't have to transpose with ', you can just use rand(2,1)).

MATLAB: Sorting the rows of a 2-column matrix based on entries from one column.

C = {4, 'Apple';
     3, 'Orange';
     6, 'Pear';
     1, 'Peach'};
sortrows(C)
ans =
    4×2 cell array
      [1]    'Peach' 
      [3]    'Orange'
      [4]    'Apple' 
      [6]    'Pear'

See the documentation for sortrows for details.

Best Answer

Related Solutions

MATLAB: Create a 2-column matrix, random set of weight

MATLAB: Sorting the rows of a 2-column matrix based on entries from one column.

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