graph ezplot and flpot

Question

oshawcole 2017-9-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/356392-graph-ezplot-and-flpot

评论： Rena Berman 2017-9-14

采纳的回答： Walter Roberson

You are required to design, code, and test a Matlab program that performs the followings:

Request the user to enter a single variable function to find root, upon which a graph should get displayed.
Request the user to enter the interval that contains roots by looking at graph.
On the same window, the user should choose between‘Newton’ and ‘Newton raphson’ methods for a solution
Display answer from the method and compare with fzero in same window.

How to do this? What does this question wants? Anyone can explain in more details, including the codes as well.

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Walter Roberson 2017-9-13

It is your assignment; if we provide the code then which of us will get academic credit?

Rena Berman 2017-9-14

(Answers Dev) Restored edit

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Answer 1

Walter Roberson 2017-9-13

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https://ww2.mathworks.cn/matlabcentral/answers/356392-graph-ezplot-and-flpot#answer_281316

https://www.mathworks.com/matlabcentral/answers/355834-how-to-display-a-graph-after-getting-user-to-input-in-the-pop-up#answer_280876

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Walter Roberson 2017-9-13

ezplot is an older routine. It can plot functions of one variable and functions of two variables.

fplot() is a newer routine. It can plot functions of one variable, and it can plot parametric surfaces defined by separable functions for x and y, but it cannot plot functions of two variables. fplot() has a lot of hidden work inside to detect discontinuities and to try to figure out how close together it needs to sample the function to get a reasonably smooth output.

ezplot() plots the function and then returns. fplot() sets up some conditions and then returns, leaving a separate thread running doing the calculations. If you zoom into something done by ezplot() then it just enlarges what was already calculated; if you zoom into something done by fplot() then it will go back through the internal routines for detecting discontinuities and generating smooth lines.

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