reading character arrays from a file to another array in matlab

Question

I have a text file which consists of different combinations of characters. For example:

a+b*c
b+c*a
c+a*b

I want to read this file into matlab, and want to assign each line to an array like this:

c(1)=a+b*c
c(2)=b+c*a
c(3)=c+a*b

Further, I would like to assign other character arrays to the variables a,b,c etc. For example, I can assign as

a='A', b='B', c='C'

and print the final outputs as:

c(3)=C+A*B

But I am stuck at both the steps, as to how to read and assign the different lines to different character arrays in Matlab. Any suggestions are welcome.

c(3)=C+A*B or as a string like this ? -c(3)='C+A*B'

Divakar
– Divakar

2014-04-22 09:14:20 +00:00
Commented Apr 22, 2014 at 9:14 — Divakar
– Divakar, Commented Apr 22, 2014 at 9:14
yes, like a string! Thanks a lot.

prabhat
– prabhat

2014-04-22 09:26:57 +00:00
Commented Apr 22, 2014 at 9:26 — prabhat
– prabhat, Commented Apr 22, 2014 at 9:26

Divakar · Accepted Answer · 2014-04-22 09:26:52Z

1

Use importdata to read the text into a cell array and perform the replacements one by one.

Code

%%// Name of your text file
file1 = 'eqns.txt'

c = importdata(file1)

c = strrep(c,'a','A');
c = strrep(c,'b','B');
c = strrep(c,'c','C')

Output

c = 
    'a+b*c'
    'b+c*a'
    'c+a*b'

c = 
    'A+B*C'
    'B+C*A'
    'C+A*B'

If you are interested in getting the alphabets into upper-case, you can directly do so after importing data -

c = importdata(file1)
c = upper(c)

edited Apr 22, 2014 at 9:26

answered Apr 22, 2014 at 9:11

Divakar

222k19 gold badges273 silver badges374 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

reading character arrays from a file to another array in matlab

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related