ERROR FOR EZPLOT?

l=2.5;w=60;e=2*10^8;i=2000*10^-8;
r1=w*1;
x=sym('x');
sfx=(w*1)-w*x;
subplot(2,2,1)
EZPLOT(sfx,[0,2.5])
subplot(2,2,2)
bmx=(w*1*1/2)-(w*x*x/2);
EZPLOT(bmx,[0,2.5])
subplot(2,2,3)
theta=(((-w*(1-x)^3)/6)+((w*1^3)/6))/e*i;
EZPLOT(theta,[0,2.5])
subplot(2,2,4)
y=-(((w*(1-x)^4/24)+((w*x*1^3)/6)-((w*1^4)/24)))/e*i;
EZPLOT(y,[0,2.5])

here's what error i am getting :

Cannot find an exact (case-sensitive) match for 'EZPLOT'

The closest match is: ezplot in C:\Program Files\Polyspace\R2019b\toolbox\matlab\specgraph\ezplot.m

Error in sfd (line 6)

EZPLOT(sfx,[0,2.5])

Answer 1

[Steven Lord]

The case matters. Change EZPLOT to ezplot in your code.

[Walter Roberson]

In very very old MATLAB, case of functions was not sensitive, and it was common for even Mathworks provided documentation to use upper-case function names for emphasis. You can still find places where error messages or help documentation uses the upper-case version of the name.

[Walter Roberson]

l=2.5;w=60;e=2*10^8;i=2000*10^-8;
r1=w*1;
x=sym('x');
sfx=(w*1)-w*x;
subplot(2,2,1)
ezplot(sfx,[0,2.5])
subplot(2,2,2)
bmx=(w*1*1/2)-(w*x*x/2);
ezplot(bmx,[0,2.5])
subplot(2,2,3)
theta=(((-w*(1-x)^3)/6)+((w*1^3)/6))/e*i;
ezplot(theta,[0,2.5])
subplot(2,2,4)
y=-(((w*(1-x)^4/24)+((w*x*1^3)/6)-((w*1^4)/24)))/e*i;
ezplot(y,[0,2.5])