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How to determine if two cones with vertices at origin, intersect?
Hi again Doc, First thing you can do is check the dot product between the normal vectors of both cones' planes. If the dot pr...

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Zero-filling matricies but different dimensions
Hi Bran, I think this is what you're trying to do: A = [1 2 3; 4 5 6; 6 7 8; 11 12 13] B = [1 2 3; 4 5 6; 11 12 13] ...

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Finding a circle enclosing data points in a tilted plane
Hi Doctor61, First, from your previous posts and this one I see that you're doing lots of stuff with 3d geometry. I think tha...

대략 11년 전 | 1

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Interpolating matrices of different sizes to the same size
Hi Eliott, Do you have the image processing toolbox? If so, this will be quite easy: targetSize = [60 128]; Model_2_r...

11년 초과 전 | 2

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질문

Can I make a spline both smoothing *and* periodic?
Hi all, I would like to make a smoothing spline through data, and enforce point and gradient equality at either end of my spl...

11년 초과 전 | 답변 수: 1 | 0

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imfindcircles doesn't work
imfindcircles is part of the image processing toolbox, I think it came into that toolbox in MATLAB version 2012a. Do you have...

11년 초과 전 | 0

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How to determine if enter(return) was pressed ?
Hi Peter, I've found that it's often easier to supply an onKeyPress function like follows: function testme() figure('...

11년 초과 전 | 0

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fprintf %E Leading zero
Interesting question Peter... Here's a solution I found, which pretty much involves brute force shifting of characters around...

11년 초과 전 | 0

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Make a Palindrome Number
Some numbers like 323 are palindromes. Other numbers like 124 are not. But look what happens when we add that number to a revers...

11년 초과 전

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best way in terms of performance to read a text file
If your text file has exactly what you've got there (numbers separated by spaces): ---== contents of test.txt ==--- 1 2 ...

11년 초과 전 | 1

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Set colorbar ranges in 3d graphs
Hi Eleftheria, You can use *caxis()* to set the colour limits (which is part of your problem... we'll get to the next bit). ...

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문제를 풀었습니다

Clean the List of Names
Given a list of names in a cell array, remove any duplications that result from different capitalizations of the same string. So...

11년 초과 전

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How to produce isosurfaces
Hi Mikael, you're almost there. Isosurface cuts the data _above_ the isovalue you provide. You need to change your value to, say...

11년 초과 전 | 1

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How can I make matlab stop recognizing string as char?
I think the issue here is just a typo: "strcomp" is not a MATLAB function. I think you mean "strcmp". wavetype = 'sawtoo...

11년 초과 전 | 1

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Make code faster for import and array creation
Hi Jenna, I bet this is a pre-allocation issue. When you build a big matrix one column at a time (such as is being done for *...

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how create a new matrix with values found in an another matrix
Hi Gianluca, Have you tried using the second output from find_ndim? [I, Imap] = find_ndim(A,3,'first'); B = A(Imap); ...

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change the orientation of the xtick labels
There's no way to _directly_ change the orientation of the xtick labels (using plain old MATLAB). You can try a work-around: ...

11년 초과 전 | 0

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find index on 3d matrix
Hi Gianluca, The MATLAB docs say "TriScatteredInterp is the recommended alternative to griddata as it is generally more effic...

11년 초과 전 | 2

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How to replace multiple strings in a txt file
Hi Steven, Try this, it's basically 3 steps: # Read the file into a cell of strings (1 per line in the original file) # R...

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what is another logic that has execution time faster than randi?
I agree with Matt - I bet there are faster ways to run your loop, and we can probably help out if you can describe what the loop...

11년 초과 전 | 0

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Load Column Data in Popup Menu Guide
Hi Amanda, fid = fopen('A.txt'); datas = textscan(fid,'%f %f','headerlines',1); fclose(fid); figure winterHan...

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문제를 풀었습니다

Alphabetize by last name
Given a list of names in a cell array, sort the list by the last name. So if list = {'Barney Google','Snuffy Smith','Dagwood ...

11년 초과 전

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Find relatively common elements in matrix rows
You want to find all elements that exist in greater than 50% of the rows in the matrix. For example, given A = 1 2 3 5 ...

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Which doors are open?
There are n doors in an alley. Initially they are all shut. You have been tasked to go down the alley n times, and open/shut the...

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Is it possible to update two different graphs?
Hi David, What exactly do you mean by "keep two different graphs going"? If you just mean that you want to have two graphs...

11년 초과 전 | 2

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Reading data from a text file
Hi Bry This code should work just fine to do what you describe. It uses a regular expression at each line of the text file to...

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plotting data with different color
data = rand(120,3) figure, hold on plot(data(:,1),'go') plot(data(:,2),'ro') plot(data(:,3),'bo') set(gca,'Colo...

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Purpose of guidata(hObject,handles)
Every graphics "object" (a figure, an axes, a button, a textbox etc) is represented by a "handle" variable. That's the hObject. ...

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How can one GUI write to an Edit Text box on another GUI?
"What's the magic recipe?" 1. Get a handle to the text box you want to edit. 2. Call: set(myHandle,'String','My New S...

11년 초과 전 | 2

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How can I query data?
Hi Tan, let's take this one step at a time. *STEP 1: Load your data from excel and into MATLAB* allData = xlsread('c:/yo...

11년 초과 전 | 1

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