Plotting of an inline function

9 次查看（过去 30 天）
Sahil Khan
Sahil Khan 2018-8-31
编辑： madhan ravi 2018-8-31
str=input('Give an equation in x\n','s');
f=inline(str,'x');
I want to plot a graph of the function 'f'. I tried fplot but it is not working. How can I plot 'f' vs. 'x'.
  10 个评论
显示 8更早的评论
Stephen23
Stephen23 2018-8-31
编辑：Stephen23 2018-8-31
"What toolbox is required for this?"
Use an internet search engine to find this page:
https://www.mathworks.com/help/symbolic/str2sym.html
Read the text in the top left corner of that page:
Symbolic Math Toolbox
Use an internet search engine to search for "MATLAB what toolbox licenses do I have"
... etc
madhan ravi
madhan ravi 2018-8-31
编辑：madhan ravi 2018-8-31
Thank you @stephen and sorry

请先登录，再进行评论。

请先登录，再回答此问题。

回答（2 个）

Stephen23
Stephen23 2018-8-31
编辑：Stephen23 2018-8-31
You should use str2func to create an anonymous function:
str = input('Give an equation in x: ','s');
fun = str2func(sprintf('@(x)%s',str));
fplot(fun,[0,10])
And tested:
>> str = input('Give an equation in x: ','s');
Give an equation in x: sqrt(x)-x
>> fun = str2func(sprintf('@(x)%s',str));
>> fplot(fun,[0,10])
Star Strider
Star Strider 2018-8-31

类别

在 Help Center 和 File Exchange 中查找有关 Function Creation 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by