What causes difference between ezplot and fplot for the same function plotted below?

Question

Asiegbu Kanu-Asiegbu 2018-4-1

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/391994-what-causes-difference-between-ezplot-and-fplot-for-the-same-function-plotted-below

回答： ahmad amer 2018-12-19

Trying to understand difference between ezplot and fplot? When script below is graphed for ezplot around 0.2 sec there appear to be 2 changes in slope of line. Howeve, for fplot around 0.2 sec there is only 1 change in slope of the line (which is the desired result)

%% Code

Fo = 3000; %N

to = 0.2; %s

syms t

F = (Fo/to)*(t*heaviside(t)-(t)*heaviside(t-to)+ to*heaviside(t-to)-to* heaviside(t-5*to) );

%%%%%%%%%%%%%

figure (1)

ezplot(F, [0, 10*to])

title('From ezPlot')

xlabel('time [s]')

ylabel('Force [N]')

%%%%%%%%%%

figure(2)

fplot(F, [0, 10*to])

title('From fplot')

xlabel('time [s]')

ylabel('Force [N]')

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Answer 1

lokender Rawat 2018-4-4

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https://ww2.mathworks.cn/matlabcentral/answers/391994-what-causes-difference-between-ezplot-and-fplot-for-the-same-function-plotted-below#answer_313454

在 MATLAB Online 中打开

ezplot(f) plots the expression f(x) over the default domain -2π < x < 2π, where f(x) is an explicit function of only x.

Where as, fplot(f) plots the curve defined by the function y = f(x) over the default interval [-5 5] for x.

We can plot the curve over some specified interval as well. The curve that is produced is same for both the functions. But ezplot is not recommended as it behaves differently under different environments and fplot is used instead.

To get the correct alignment with ezplot, you can use the below command right after the ezplot function command as below to adjust the curve: