MATLAB: Converting fractions to decimals in exponents of symbolic expressions

decimalexponentssymbolic

I'm performing symbolic differentiation on 2*x^(3.7). The diff command returns
>> diff(2*x^(3.7))
ans =
(37*x^(27/10))/5
I'd like to see the answer as 7.4*x^(2.7). Using the vpa command,
>> vpa(diff(2*x^(3.7)))
ans =
7.4*x^(27/10)
It gives the 7.4, but it does not affect the exponent. Is there any way to convert all the fractions to decimals in a symbolic expression like this?

Best Answer

maybe like this:
syms x
   a=sym('3.7')
   f=sym((2*x.^(a)))
   digits(20)
   a=vpa(diff(f,x))
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