Invalid syntax error with a simple code

Question

Ahmad Jundi 2020-11-5

评论： Ahmad Jundi 2020-11-5

I am trying to write a simple MatLab code but continue to get an error that I can't find a fix for.

x = [-2 -1.5 -1 -0.5 0 0.5 1 1.5 2];
y = (x+x(sqrt(x+3)))*(1+2(x^(2)));

The error is at line 2, on the parenthesis that is bolded between the 2 and x. Any reason why?

Error: File: Assignment2.m Line: 2 Column: 26

Invalid expression. When calling a function or

indexing a variable, use parentheses. Otherwise,

check for mismatched delimiters.

Answer 1

Rafael Hernandez-Walls 2020-11-5

tray this

x = [-2 -1.5 -1 -0.5 0 0.5 1 1.5 2];
y = (x+x.*(sqrt(x+3))).*(1+2*(x.^(2)));

Walter Roberson 2020-11-5

Right. MATLAB has absolutely NO implied multiplication, anywhere. Not even inside the symbolic toolbox internal language.

Ahmad Jundi 2020-11-5

Ahh I see now I didn't know that! Thank you so much this helped a lot!

p.s. I am extremely knew to MatLab and want to learn how to use it.