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David


University of Oxford

Active since 2011

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Question


Undefined variable "matlab"
Hi, I recently installed MATLAB 2018b onto a new Windows 10 machine. Running an old .m file, I now see an error when calling th...

5 years ago | 1 answer | 0

1

answer

Answered
Exclude points in a surface fit with lsqcurvefit
If anyone is interested how I solved this: I used the "fit" function instead and created a weighting function where I weighted m...

6 years ago | 0

| accepted

Question


Exclude points in a surface fit with lsqcurvefit
Hi, Is it possible to exclude points in a 2-D fit when using the function lsqcurvefit? If it is possible, what syntax coul...

6 years ago | 1 answer | 0

1

answer

Question


Different order Bessel function in each column of an array
Is there a way of calculating the array J, below, without using a loop? X = 0:0.1:20; J = zeros(5,201); for...

6 years ago | 1 answer | 0

1

answer

Answered
All figures in subplot saved to animated gif file.
I think I have solved this myself. I will leave the answer here in case anyone else has a similar problem. Ammended code: ...

6 years ago | 14

| accepted

Question


All figures in subplot saved to animated gif file.
Hi, I am attempting to save a sequence of figures created using the subplot() function to a .gif animation. Currently, onl...

6 years ago | 1 answer | 1

1

answer

Question


Resample example from Mathworks site not working (for me).
Hi, I am attempting to run the example code for the resample function found on the Mathworks website: <http://uk.mathworks...

8 years ago | 2 answers | 0

2

answers

Answered
Calling a custom function in fittype
In case it simplifies the situation at all, I have rewrote the FWHMf function to: function[F05] = FWHMf(x,Y) ...

8 years ago | 0

Question


Calling a custom function in fittype
Hi, I am attempting to create a custom fit, which itself calls a simple function. In a separate .m file I define a functio...

8 years ago | 1 answer | 0

1

answer

Question


Fresnel-like diffraction using linear convolution
Hi guys, I'm trying to calculate the convolution of a Gaussian function and a parabolic wavefront (like in Fresnel diffractio...

10 years ago | 1 answer | 0

1

answer

Question


Missing legend entries on plotyy
Hi, I am attempting to plot data on to a graph with two different y axis. I used the plotyy function. To plot four functions ...

11 years ago | 1 answer | 0

1

answer

Question


passing variable value into fittype function
Hello, I am having some trouble passing variables into the fittype function. I would like to pass the coefficient value fr...

12 years ago | 0 answers | 1

0

answers

Question


Quickly access a group of arrays using a loop
Hi, I have a set of arrays labeled as "A1", "A2", "A3"..."An" What I would like to do is write a loop that allows me to acce...

12 years ago | 1 answer | 0

1

answer