How to change mathematical symbols of division (/ to ./) and multiplication(* to .*) in a very long formula obtained by symbolic tool.
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Mahak SINGH CHAUHAN
le 27 Mar 2014
Commenté : Joseph Cheng
le 27 Mar 2014
I am using symbolic toolbox in order to write a formula and differentiation etc. After I have to use my final formula in a function. But in obtained formula by symbolic toolbox, symbol of division and multiplication are / and * respectively. When I put the values of a variable in vector or matrix form, It gives the error. So I have to change the symbols manually for example / (division) to ./ and * (multiply) to .*
Is there any alternate way to solve this problem. Thanks in advance.
0 commentaires
Réponse acceptée
Mischa Kim
le 27 Mar 2014
Mahak, copy-paste the formula into a script/function editor and use CTRL+F to replace the strings.
Plus de réponses (1)
Joseph Cheng
le 27 Mar 2014
Modifié(e) : Joseph Cheng
le 27 Mar 2014
to do this you can do something like this.
textEquation=char(symsEquation);
division = [0 strfind(textEquation,'/')];
elbyelDivEquation=[];
for i =1:length(division)-1
elbyelDivEquation = [elbyelDivEquation textEquation(division(i)+1:division(i+1)-1) './'];
end
elbyelDivEquation=syms(elbyelDivEquation);
I did the / substitution quickly so didn't verify if it actually does capture whats between the / and then inserts the other portions. but that should do the trick.
2 commentaires
Joseph Cheng
le 27 Mar 2014
if this is a one off then Mischa Kim solution would be easier. However if this is going to happen routinely (say in a program or multiple runs in a script) you may want to automate it.
Voir également
Catégories
En savoir plus sur Assumptions dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!