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# Tom

Active since 2011

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Question

Need to improve efficiency in this code, which multiplies a 3D matrix by a 2D one
Hi, I have this code, which uses for loops and multiplies a 3D matrix with a 2D one. It works, but I need f_N to be 3200, and on...

8 years ago | 1 answer | 0

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How can I install MATLAB versions R2011a - R2013a on macOS 10.10 Yosemite or later?
That worked for me - Matlab 2011a on Yosemite 10.10.4 on 7/7/15

8 years ago | 0

Question

Reducing values preceding the 1st minima to zero
I need to reduce the value of all the values before the 1st minima, to zero, e.g. if I had: - x = 0:30; y = [10 9 8 7 6 ...

9 years ago | 2 answers | 0

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Question

arrayfun once with 4 variables, or twice with 2 in each, then mult. Why do these two approaches give different solutions?
I have the following code to achieve W_n %% CONSTANTS & VARIABLES clear all; close all; L_x = 27....

9 years ago | 1 answer | 0

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Question

3D matrix manipulation problems
I struggle with this generally and have come up against a barrier again. I'm trying to create vibrational mode functions for ...

10 years ago | 1 answer | 0

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Question

How do I create a (10,10) matrix containing numbers from 1 to 100?
How do I create a (10,10) matrix containing numbers from 1 to 100? I just want the numbers to go 1 to 10 on the top row, then...

10 years ago | 5 answers | 0

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Question

Multiplying matrices as cells - 4 dimensional with variable no. of matrices (code works now!)
%I'm trying to work with 4 dimensional cells containing matrices that need multiplying together. %I have three matrices, A_1,...

11 years ago | 1 answer | 0

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Question

How do I create a vector of n exponentially increasing values from a to b?
I know how to calculate the growth factor, but not how to turn it all into a vector. Here's the start of my code: - n = 4 a...

11 years ago | 2 answers | 1

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Question

curve of best fit from a few points
I have these points: - x=[1 1.5 2 2.5 3]; y=[19.74 14.26 12.34 11.45 10.97]; and I know I can do a very rough approximat...

11 years ago | 4 answers | 0

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Question

Simple x-y curve fitting from data set.
I'm struggling to find a simple example of simple curve fitting in MATLAB. I just want to do a best-fit curve for the followi...

11 years ago | 1 answer | 0

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Question

Building a surface plot
Please would someone be willing to help me build a surface plot based on this code: a = 5 b = 6 x = 1:a; y = 1:b; wher...

11 years ago | 1 answer | 0

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Question

best way to import this csv
I can't work out how to import this csv file - https://dl.dropbox.com/u/11341635/Data.csv Have tried various methods but I fi...

11 years ago | 2 answers | 0

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MATLAB can't find my file
Yes thanks that worked. I just copied and pasted the address from that and it's working now. Many thanks.

11 years ago | 0

Question

MATLAB can't find my file
I'm trying to read in an excel spreadsheet and I can't get it to do it. I put the spreadsheet in the MATLAB home director...

11 years ago | 2 answers | 0

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Question

can't do a simple csvread for some reason
I'm just trying to do a csvread and I can't seem to get it working. I opened a text edit file (mac) and put: 1,2,3, 4,5,6, ...

11 years ago | 1 answer | 0

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Question

Can array values be used in plot titles?
I'm really sorry I can't be more specific and include any code, but this is for an assignment and so it would be wrong to publis...

11 years ago | 2 answers | 0

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Question

Figures displaying differently in and out of MATLAB
My figures are displaying differently in and out of MATLAB. I saved an image as an uncompressed TIF: - <https://dl.dropbox.co...

11 years ago | 1 answer | 0

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Question

surf plot won't happen because i need a matrix?
surf plot won't happen because i need a matrix? I've just introduced a new variable to my script and I tried doing it using a n...

11 years ago | 1 answer | 0

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Question

Help with code needed - sampling
Help with code needed - sampling I have an equation of a signal, and I'm supposed to be making a PDF graph of it - but I can'...

11 years ago | 2 answers | 0

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Question

working with two variables
working with two variables i'm not sure if this is possible, but is it possible to make a 3D plot using an equation based on tw...

11 years ago | 1 answer | 0

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Question

Help needed displaying multiple plots (and maybe preassigning too)
Help needed displaying multiple plots (and maybe preassigning too) I've got this script, but when I try add x and y labels it r...

11 years ago | 2 answers | 0

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Question

For loop - what about my min and max values?
For loop - what about my min and max values? I'm using a for loop and although my plot is right, I'm only seeing my maximum x-a...

11 years ago | 1 answer | 0

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Question

Animation help needed with
Animation help needed I'm trying to display 10 graphs in a sequence as an animation, running from t=1 to t=10. Here's my code...

11 years ago | 5 answers | 0

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Question

Function definitions are not permitted.... trying to make an FFT thing
Function definitions are not permitted.... trying to make an FFT thing I'm trying to get this working close all clear a...

11 years ago | 3 answers | 0

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Question

can't do this
can't do this Hi, I'm attempting nested for loops and failing miserably. Here's my code: - close all; clear all; ...

11 years ago | 1 answer | 0

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Question

For loop and indexing combined?
I think I'm nearly there with this code. close all; clear all; l=0.33;R=100;T=68;m=0.000125;w0=0.1;t=0;mu=m/l;c=sqrt(T/m...

11 years ago | 2 answers | 0

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Question

Need to change one of my constants into a variable
The original question has been removed by the user.

11 years ago | 1 answer | 0

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Question

Need to derive the CDF for a function using Matlab
The original question has been removed by the user.

11 years ago | 2 answers | 0

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Question

Help with code needed - iter + 1
The original question has been removed by the user.

11 years ago | 0 answers | 1