Answered
Efficiently populating an array without for loops
Yeah that's searching through your data an awful lot every time you do the |==| comparisons. The way I do this kind of thing wh...

12 years ago | 0

Answered
how to label the vacant space
I wouldn't use regionprops here. That just connects pixels. You can't guarantee that will have anything to do with empty parkin...

12 years ago | 0

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Answered
Compare two strings based on ASCII dictionary order
Yeah this is a real failing of the |strcmp| function in my opinion. That function originated in C, and would tell you whether a...

12 years ago | 3

Solved

Find the longest sequence of 1's in a binary sequence.
Given a string such as s = '011110010000000100010111' find the length of the longest string of consecutive 1's. In this examp...

12 years ago

Solved

Too mean-spirited
Find the mean of each consecutive pair of numbers in the input row vector. For example, x=[1 2 3] ----> y = [1.5 2.5] x=[1...

12 years ago

Answered
two picture pixels
You are addressing |fd(:,:,:,a)| as a 4-dimensional array, but it is declared as a 1-dimensional array. You need to make sure...

12 years ago | 0

Answered
Reading Binary(?) to hex to float.
Um, you're reading one at a time? Can you not first determine the file size: fseek(fid, 0, 'eof'); fsize = ftell(fid)...

12 years ago | 1

Answered
Estimation of the "pixelization" error introduced when using the digital image processing toolbox
This is just a stab in the dark, but I gather that after processing you get an image with logical (0 or 1) pixels, and you obta...

12 years ago | 0

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search algorithm in the volume of a cone.
Well, you need a point that defines the apex of the cone, a vector definining the cone's major axis, and the half-angle (angle b...

12 years ago | 0

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Answered
How to stack image files if they are of different size
When you say 'stack', are you storing each image as a 'page' in some dimension? So you might have: imageStack = nan( maxHe...

12 years ago | 0

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Answered
Creating .txt file with matlab
This opens the file once (overwriting if it already exists) and writes your results one line at a time. fid = fopen( 'resul...

12 years ago | 4

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Answered
How to read any file by using txt ?
The only difference between reading a binary file versus a text file is to translate end-of-line characters. Other than that (a...

12 years ago | 0

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how to read complicated CSV files into matlab?
Easiest is to read your file one line at a time, and separate your sections. If your files follow exactly the format you've lis...

12 years ago | 0

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Answered
custom byte swapping of binary file
Hey Peter, do you actually know the format of your data? I was under the impression that you didn't know what the binary struct...

12 years ago | 2

Answered
grouping observations with specific characteristics
You mean you want to sort by Location, then Time, then Country, then Price? Before you go MatLabbing this... Would you consi...

12 years ago | 0

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Answered
Select data by attributes
Do you mean you have a structure: Polylines.Accuracy Polylines.SomeOtherField1 Polylines.SomeOtherField2 ... etc ...

12 years ago | 1

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Answered
Connected component labeling
Is this an assignment for a course you are doing? If so, what algorithms have you discussed in lectures? Surely you would not ...

12 years ago | 1

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image color detection
What about purplish-greenish-gray? Where do you draw your boundary? Anyway... A simple approach here is to define all t...

12 years ago | 1

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How to create a regular data matrix from irregularly sampled XYZ data with different X and Y coordinates
Well, I might do this: d = [2.0000 0 0.3800; 2.0000 5.0000 0.3480; 2.0000 25.0000 0.3...

12 years ago | 0

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Answered
Find Angle Between Two Line
When I want to find the angle between two vectors, I take the dot product of the unit vectors: clamp = @(val, low, high) mi...

12 years ago | 0

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Help Sorting columns
Get the indices for sorting the last row: [~, I] = sort( data(end,:) ); And then reindex your matrix: sdata = data(...

12 years ago | 1

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Answered
Index for loop
To do this in a loop (not the |find| command), you are doing a few things wrong. Here is your code: i=1; for item...

12 years ago | 0

Answered
I need one by the element-free Galerkin method for solving one-dimensional Burgers equation Matlab procedures, thanks a lot
There is some code here which is just waiting for a little more clarification from its author before the MatLab community can he...

12 years ago | 0

Answered
non linear data fit (weighted least square)
Let's say you have your function: f = @(x,a,b) = a * x.^b; Now, you have your data set and weights: X = [...]; Y...

12 years ago | 1

Answered
rolling dice problem in cody..........error in this code??
Don't use round: |randi| already returns integers.

12 years ago | 0

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Solved

Roll the Dice!
*Description* Return two random integers between 1 and 6, inclusive, to simulate rolling 2 dice. *Example* [x1,x2] =...

12 years ago

Answered
subscript indices must either be real positive integers or logicals - how to change lat/lons from double to integers?
If they just need to be indices, you can use |ceil|, |floor|, |fix| or |round|. _eg_ x = fix(x) If you want to convert ...

12 years ago | 0

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Answered
vector sum and magnitude
Maybe this will help: function [vec, mag] = DoMyHomeworkForMe( v1, v2 ) % Your calculation goes here end

12 years ago | 1

Answered
generating executable file
You must install the MCR on that system. Search your matlab installation tree for |MCRInstaller.exe| On my system it is in...

12 years ago | 0

Answered
What value have a variable 'edit text' guide
No, you need to use |isempty|. if isempty(T) T = 0.001; end Note that if you use |str2double| instead, you'll ge...

12 years ago | 1

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