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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 comentarios
Respuestas (1)
Walter Roberson
el 28 de Sept. de 2011
It is a bug in ezplot in constructing the error message to tell you that ezplot cannot be used to plot equations in more than 2 variables.
8 comentarios
Walter Roberson
el 2 de Oct. de 2011
Those equations are difficult to solve, even individually by substituting values in to free variables.
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