Can MatLab convert something like
syms t real
2*t^2+5*t+6
to
2.*t.^2+5.*t+6
automatically?
Example
syms t real
a=2;
v=int(a,t);
Now v=2*t so I want to convert it to v=2.*t.
If you have a string, you can do the replacing with regexprep:
>> str = '2*t^2+5*t+6-3/t'
str =
2*t^2+5*t+6-3/t
>> str = regexprep(str, '([\*\^\/])', '.$1')
str =
2.*t.^2+5.*t+6-3./t
As you see, this changes all occurrences of *, ^ or / to their dotted versions.
If the string may already contain some dotted operators, modify the regular expression as follows to avoid double dots:
>> str = '2.*t^2+5*t+6-3./t'
str =
2*t^2+5*t+6-3/t
>> str = regexprep(str, '(?<!\.)([\*\^\/])', '.$1')
str =
2.*t.^2+5.*t+6-3./t
Or, as suggested by @knedlsepp, use the vectorize function:
>> str = '2.*t^2+5*t+6-3./t'
str =
2.*t^2+5*t+6-3./t
>> str = vectorize(str)
str =
2.*t.^2+5.*t+6-3./t
If you have a symbolic function, use matlabFunction to generate an anonymous function:
>> syms t real
>> a=2;
>> v=int(a,t)
v =
2*t
>> v = matlabFunction(v)
v =
@(t)t.*2.0
so now
>> v(3)
ans =
6