cell2sym...where it is?

i need to convert from cell to symbolic,because I have to integrate the equations with "int" but i can't do it!. Can somebody help me? Thanks.

>> e=importdata('Ecuaciones.dat')

e = 

    'x '
    'x^2 '
    '2*x^3 '

>> e1=cell2sym(e)
Undefined function or variable 'cell2sym'.

Answer 1

[KALYAN ACHARJYA]

May be you are using earlier version of Matlab, cell2sym is Introduced in R2016a

[Junior Joel Aguilar Hancco]

:( i'm using R2015a. Thanks!