CODEWITHSUNDEEP
matlab
osimer pothe
osimer pothe

Reputation: 2897

textread does not read data correctly from file

I am using the following code to read from a file in MATLAB .

A=textread('A.txt');
B=textread('B.txt');
F=textread('F.txt');
LB=textread('LB.txt');
options = optimset('LargeScale','off','Simplex','on');

disp('Main Solution')
[X,fval,exitflag,output,lambda] = linprog(-F,A,B,[],[],LB,[],[],options);
-fval
exitflag 
output

The actual data in the file is as following like the image :

enter image description here

But MATLAB reads this as like follows :

enter image description here

Why ? Is there any problem ? First data is 1674.25 but MATLAB reads it as like 0.1665 . WHy ?

Upvotes: 0

Views: 118

Answers (2)

user2271770
user2271770

Reputation:

If you'll look closely, you will see that F is displayed like

1.0e+004 *
...
...

which means that all the values in the columns are actually multiplied by a 10000 factor. Thus 0.1665 * 10000 = 1665 which is approx 1674.25.

NB1: Mathworks recommends textscan() instead of textread();

NB2: For immediate feedback from the console about a problem, try the standard command why in command window.

Upvotes: 2

craigim
craigim

Reputation: 3914

It is reading the file correctly. What you're seeing is only a display issue. Notice the 1.0e+004 * at the top of the listing. Try typing 'format longg' and then look at the values, or else just type F(1) to look at the first value.

Upvotes: 1

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