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index out of bounds
juju defines the intervals between sections. With 8 intervals, you define 7 sections. It fails when trying to get the 8th sectio...

11 years ago | 0

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Slow Triple for loop
1. Do the calculations as few times as possible: The following should be in the outer loop. - Unless you want latcounter to be a...

11 years ago | 2

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make a GUI for an existing programme
You can make a gui do almost anything, if you're willing to put in the effort to make it work the way you want it to. "guide" is...

11 years ago | 0

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initialising a color map
image_dat = uint16(randn(1024,1280)*5+5000); % random image (single colour channel) imagesc(image_dat) % display it colorbar ...

11 years ago | 0

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saving an variable into matlab for future use
Use cell arrays: variable{1} = 4; variable{2} = 'String'; variable{3} = 'D:\filehere\hi.wmv'; variable{4} = yourloadfu...

11 years ago | 0

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dynamic variable names in a loop
Thats a really bad idea. x={}; %real code loop starts here %pseudocode stuff = your input function that gets an input %...

11 years ago | 0

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if statement gives wrong results or does not work?
"any" and "all" are your friends, You have actually written if ALL of a >= a_sat set "b" else, if ALL of a < sat ...

11 years ago | 0

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Answered
Plotting multiple days on one graph
Plot the times as date numbers (check the documentation for "datenum") Change the x axis labels to the "datestr" with something...

11 years ago | 0

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finding values from matrix
A = [45 46; 42 43]; logical_address = A>45; A(logical_address) %gives you a single 46. linear_index = find(logical_addr...

11 years ago | 0

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How can I generalize this for loop?
Whats wrong with? t = cumsum(d)/total;

11 years ago | 0

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Answered
Generate variable names and assign them to workspace variables
This is the answer to the question you've asked: generated_variable_name = 'Big_whatever'; %(needs to be in your working wor...

11 years ago | 1

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Answered
How can I findout mean,standard deviation and variance using hiatogram of an image
Easier to do that straight from the image: my_image = uint16(randn(128,128)*16383); std_of_my_image = double(std(my_i...

11 years ago | 0

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How can I get 2 signal differences in log scale?
You can get the ratio between the power levels simply by taking dB1 - dB2. This is probably more sensible unless the numbers are...

11 years ago | 0

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Can I determine iteration number which matlab executes?
count = 0; while dx~=0 .... .... count = count + 1; end

11 years ago | 1

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Answered
Generating random numbers from normal distribution
If you take a random number from a gaussian (aka normal) curve, you can calculate the probability that number would come up. ...

11 years ago | 0

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Answered
how to maintain continuity and periodicity of a function
Try ensuring that your fit wraps around - ie, that you give it x = 366 and y = the value it has when x = 0.

11 years ago | 0

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Access elements/fields from a struct
Sounds like you have something like: b = dir('C:\Windows\'); b(1) names = fieldnames(b(1)); for i = 1:numel(nam...

11 years ago | 4

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Answered
Does in-equality operators work in comparison of two time format?
You have your brackets in the wrong places. (datenum(time_e_rad(j,:))< datenum(upp_lim)) && (datenum(time_e_rad(j,:)) >= d...

11 years ago | 1

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Answered
Why is GUIDE not allowing me to have one (1) column and three (3) rows in my table? It seems as if the default table is 4 x 2
In your workspace, generate the default contents for the table. Set the data on the table to that.

11 years ago | 0

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Indexing problem - how to obtain row and column and use later
whereAequalszero = A ==0; B = A; B(whereAequalszero) = 4;

11 years ago | 0

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Answered
how to plot y=ax+b for different equations
x = min_desired_x:step_size:max_desired_x; y = (x>0 & x<=1) * 1 + ... (x>1 & x<=3) * (2*x+1) + ... (x>3 & x<=5) *...

11 years ago | 0

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How to impute missing values using mean for a table
Use nansum, or nanmean, as required.

11 years ago | 0

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Hyper Image intensity level
You need to know the bit depth of each "slice" of your hypercube. (We can't tell you this, but its normally 8 bit for a standard...

11 years ago | 0

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Answered
Given an array of data, is it necessary to use FFT to get the amplitude?
Try plotting it and seeing what that tells you... (max(2nd column) - min(2nd column))/2 might make most sense ;)

11 years ago | 0

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Answered
Breaking up a matrix/array
codes = matrix(:,1); code_list = unique(codes); for i = 1:numel(code_list) new{i} = matrix(code_list(i) == codes,:); e...

11 years ago | 0

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Answered
subtract numbers in the row
diff(x)

11 years ago | 1

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Answered
change variable and assign to dataset in each loop
Three approaches for i = 1:12 %(Sheets not the same size) [numbers{i} texts{i} raws{i}] = xlsread(....); end Or ...

11 years ago | 1

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Answered
How to check the value of a varriable of a subfunction?
You can use the command line option dbstop if error Or you can insert breakpoints inside your function to inspect (or c...

11 years ago | 0

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Preallocating memory for a matrix of unknown size
At what point do you know the required size? If it's "at the end", then you do have to do with the "arbitrarily big" option, ...

11 years ago | 4

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Answered
Create a blank m-file by command lines
fid = fopen('D:\myfileshere\newfile.m','w'); fclose(fid); That will in fact create a new "m" file.

11 years ago | 0

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