No line on graph

Question

Zane Wilkinson 2015-8-4

编辑： Walter Roberson 2015-8-4

Hey guys first week using matlab and trying to graph this...

fplot(@(t)(((-0.005*pi*sqrt(5)*t)./2)+(2*sqrt(5)).^2), ([0,37.3,40,80]))

but when i press enter no lines show up on the grid.

any advice is great

Thanks

zane :)

Answer 1

Al Dente 2015-8-4

your function:

z = @(t)(((-0.005*pi*sqrt(5)*t)./2)+(2*sqrt(5)).^2);
z(0:37.3) % would output values in the range of 19.3 to 20

From the matlab documentation:

FPLOT(FUN,LIMS) plots the function FUN between the x-axis limits specified by LIMS = [XMIN XMAX].

Using LIMS = [XMIN XMAX YMIN YMAX] also controls the y-axis limits.

so you're basically telling the function to plot y values from 40 to 80 even though your output ranges between 19 to 20