# Plotting help

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Hi, I'm pretty new to Matlab, and I tried to execute this script:

eq1 = '((((1.5-(x-(i*(y))))/(1.5+(x-(i*(y)))))+((((x-(i*y))-((3.46163-(i*(0)))))/((x-(i*(y)))+(3.46163-(i*(0)))))*(exp(-2*i*((pi*2)/1796)*(x-(i*(y)))*z))))/(1+(((1.5-(x-(i*(y))))/(1.5+(x-(i*(y)))))*(((x-(i*(y)))-(3.46163-(i*(0))))/((x-(i*(y)))+(3.46163-(i*(0)))))*(exp(-2*i*((pi*2)/1796)*(x-(i*(y)))*z)))))-.30441';

eq2 = '((((1.5-(x-(i*(y))))/(1.5+(x-(i*(y)))))+((((x-(i*y))-((3.46153-(i*(0)))))/((x-(i*(y)))+(3.46153-(i*(0)))))*(exp(-2*i*((pi*2)/1798)*(x-(i*(y)))*z))))/(1+(((1.5-(x-(i*(y))))/(1.5+(x-(i*(y)))))*(((x-(i*(y)))-(3.46153-(i*(0))))/((x-(i*(y)))+(3.46153-(i*(0)))))*(exp(-2*i*((pi*2)/1798)*(x-(i*(y)))*z)))))-.30440';

eq3 = '((((1.5-(x-(i*(y))))/(1.5+(x-(i*(y)))))+((((x-(i*y))-((3.46143-(i*(0)))))/((x-(i*(y)))+(3.46143-(i*(0)))))*(exp(-2*i*((pi*2)/1800)*(x-(i*(y)))*z))))/(1+(((1.5-(x-(i*(y))))/(1.5+(x-(i*(y)))))*(((x-(i*(y)))-(3.46143-(i*(0))))/((x-(i*(y)))+(3.46143-(i*(0)))))*(exp(-2*i*((pi*2)/1800)*(x-(i*(y)))*z)))))-.30439';

ezplot(eq1), hold on;

ezplot(eq2), hold on;

ezplot(eq3), hold off;

but it didn't work (some of you want to sternly tell me off right now, I know). Here is the error message:

??? Error using ==> char

Cell elements must be character arrays.

Error in ==> ezplot at 158

fmsg = char(f);

Error in ==> nonlintest2 at 4

ezplot(eq1), hold on;

Error in ==> run at 74

evalin('caller',[script ';']);

So, as a new user, I don't know how to use this error report very well, and looking online has gotten me some approximate info, but nothing that truly explains my situation to me. Can anyone help me with this please? I'd love to learn how to make this work.

##### 2 Comments

### Answers (1)

Walter Roberson
on 28 Sep 2011

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