Output result's format?
12 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
ErikJon Pérez Mardaras
am 30 Jan. 2021
Kommentiert: ErikJon Pérez Mardaras
am 7 Feb. 2021
I am executing a great-script which has inside it another mini-scripts.
Those scripts execute mathematical operations in order to calculate and show results of differente variables.
The issue is that Matlab do show those results correctly but some of the in this strange format:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/504598/image.png)
How can I solve this problem and achieve Matlab giving me the results in a normal format? I think that this doesn`t happen if I execute those mini-scripts separately and individualy. It only happens when I execute the great-script. I also have tried writing
format short
In the head of each mini-script but seems that this didn't fix the issue.
Thanks!
1 Kommentar
Stephen23
am 6 Feb. 2021
The variables EVfiT and EVfiT1 are symbolic or character or possibly some custom class... they are certainly not numeric, so the format command is totally irrelevant.
Akzeptierte Antwort
John D'Errico
am 5 Feb. 2021
These are symbolic expressions you are showing. The format command has NOTHING to do with symbolic expressions. It applies only to numeric values, thus typically double precision numbers.
X = 1 + sqrt(sym('13445664/2424536343636'))
X
format short
X
format rat
X
As you see, anything I do with format does not touch how we see X.
I cannot replicate what you did, because you show only a picture of your output. (If you really want help, then paste in the actual code, as text.)
But now, if I convert X to a double,
format short
Xd = double(X)
format rat
Xd
format long g
Xd
Now you see that format works, and it works as designed. I can turn it on and off on a whim. It applies to floating point numbers. The numbers that you show in that picture LOOK like numbers. But format does not understand symbolic expressions. It ignores them.
9 Kommentare
Walter Roberson
am 7 Feb. 2021
We do not have your scripts, so we would only be able to make wild guesses.
Wild guess: You thought you were doing numeric integration, but you used int(), which is reserved for symbolic integration.
Weitere Antworten (1)
darova
am 30 Jan. 2021
try double
a = 2;
b = 1/sym(a);
c = b/a
double(c)
3 Kommentare
Walter Roberson
am 6 Feb. 2021
"format" is a command, not a local setting for functions or subroutines.
If you had a
disp('hello')
command inside a function, would you expect the output of the function to disappear from the command window when the function returned? NO -- you would recognize that disp() changes state permanently, rather than disp() being a local setting within the function. Just so, "format" changes are permanent until changed.
Siehe auch
Kategorien
Mehr zu Numbers and Precision finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!