MATLAB help
Hey,
>>I have two arrays A and B.
>>Now I want the derivative of B with respect to A at all points of A.
>>So i move on to express B=f(A).
>>i use polyfit function and get the function f.
>>then i do f1=diff(f)
Now i am facing two problems:
1.when i express b=f(a) like y=x^4+(.02*x^3) and so on,it says " Error using ==> mpower
Matrix must be square."
2.it also says "Attempted to access f1(2); index out of bounds because numel(f1)=1."
what mistakes am i doing?😔😒
Thanks in advance.
>>I have two arrays A and B.
>>Now I want the derivative of B with respect to A at all points of A.
>>So i move on to express B=f(A).
>>i use polyfit function and get the function f.
>>then i do f1=diff(f)
Now i am facing two problems:
1.when i express b=f(a) like y=x^4+(.02*x^3) and so on,it says " Error using ==> mpower
Matrix must be square."
2.it also says "Attempted to access f1(2); index out of bounds because numel(f1)=1."
what mistakes am i doing?😔😒
Thanks in advance.
Replies
-
durga chwhat is A array and dimensions of A? and whats B , what function of A is B? -
crankyHello there,
For now lets say A=[1 2 3 4 5],B=[55 88 99 101 145].B=f(A) will be taken care of by polyfit right? -
risingsuntry using '.^' instead of '^' ..it should solve your problem 😀
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durga chRising Sun is right. Since you are manipulating each element of the array, you should be going for a '.' function. Cranky, can you try as what rising sun suggested?
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crankythank you.I will update you on that
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WhAcK-O-NuTHello there people ! Cranky, I suggest you consider buying MATLAB's book written by RUDRA PRATAP. It's really good and shall assist you a great deal. It is a small book and is not expensive.😁
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jerseyswhat function of A is B?
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