ploting 4 graphs for various constant values
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Hello, i want to write code for function x=a*exp(b), where b=0:2*pi, 'a' is positive value entered by user. This should be four times, i mean 4 values of a entered by user so 4 graphs drawn on window.
clear all; close all;
for i=1:4
a=input('write positive a:', 's') b= 0:2*pi; x=a*exp(b); subplot(2,2,i),plot(x) end
However this code doesn't work well, i mean it draws completely the same for all values of a!! and more strangely when i write a=10 it gives me an error msg:
Error using * Inner matrix dimensions must agree. x=a*exp(b);
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Orion
il 17 Ott 2014
Modificato: Orion
il 17 Ott 2014
Hi,
you used input with a second argument 's', so a is interpreted as a string and not a number
for getting a string :
a=input('write positive a:', 's')
class(a)
for getting a number:
a=input('write positive a:')
class(a)
2 Commenti
Orion
il 17 Ott 2014
glad it works.
and i wrote the command
class(a)
just so you can see the class of the variable in the command window. It has no impact on the code and you don't need to keep it. It's just a useful function to know when you analyse datas.
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