I try to plot f(x) and g(x) on the same axis, but the plot is blank. What am I doing wrong?

Question

I defined f(x)=sin(2x) and g(x)=2*sin(x). Then I try to plot f(x) and g(x) on the same axis, but the plot is blank. What am I doing wrong? Here is my argument so far:

plot[{f(x),g(x)},{x,-1,1}]

You are making syntax mistakes. Use square brackets "[]" to contain arguments to functions. Also, plot needs to be capitalized. I would recommend reading a quick introduction to Mathematica. — chuy, Sep 19 '16 at 14:16
I would recommend you to read the most common pitfalls awaiting new users in Mathematica, in particular the Basic Syntax section. — dpravos, Sep 19 '16 at 14:41
The Four Kinds of Bracketing in the Wolfram Language and Making Definitions for Functions. — Karsten7, Sep 19 '16 at 14:45

score 2 · Answer 1 · edited Sep 19 '16 at 14:41

2

I am OK with Chuy but the best thing is to look at code

f[x_] := Sin[2 x]
g[x_] := 2*Sin[x]
Plot[{f[x], g[x]}, {x, -1, 1}]

every command in mathematica begins with an uppercase. Forget ( for the functions. It must be defined with brackets or you must ask it to change its behavior.

Take a good how to on internet before going further.

Cordially

edited Sep 19 '16 at 14:41

Karsten7

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answered Sep 19 '16 at 14:38

cyrille.piatecki

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I try to plot f(x) and g(x) on the same axis, but the plot is blank. What am I doing wrong?

1 Answers1