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I want to solve this equation and plot it but lot of errors are coming kindly help

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Arslan Ahmad
Arslan Ahmad 2017-5-4
关闭： MATLAB Answer Bot 2021-8-20
x=0:3;
y=diff((x^3)*(ln(3*x+1))^2)
  2 个评论
John D'Errico
John D'Errico 2017-5-4
编辑：John D'Errico 2017-5-4
I see three distinct problems (arguably a 4th too), one of which was done 3 separate times. That many problems in essentially one short line of code suggests you need to read the getting started tutorials. While you might think that this comment is non-constructive since it does not directly answer your question, in fact, it is. While somebody will probably come along and show you what to change in that one line, there are also problems of concept, that suggest you don't understand MATLAB. Showing you how to get one line of code right will not help you in the long run, whereas reading the basic documentation will serve you greatly.

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回答（1 个）

Santhana Raj
Santhana Raj 2017-5-5
Matrices multiplication can be element by element or vector multiplication. For element by element, which I assume you want, the operator is
.*
Secondly, ln is not a function in matlab. Use log.
Thirdly, I think you want x to be from 0 to 3. whatever you have written will create 4 elements. [0 1 2 3]. I am assuming that you want to do [0:0.1:3]
Fourthly, are you sure you want the difference and not the derivative.

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