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How to replace a for loop with something faster
Hi! If you don't need the results of every loop, you can write: p1 = phi.*r; p2 = phi.*(lam_+g_)-.5*g_^2; p3 = .5....

11 years 前 | 0

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How can I separate complex data from a .txt file?
Hi! It seems all your 6 fields in a row are separated with ",", right? The easiest is to read in the whole file and process e...

11 years 前 | 0

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已回答
Problem using regexp to extract certain lines
Hi! I would suggest another approach. It is (in my opinion) easier to debug, because you can track your steps easily. % ...

11 years 前 | 0

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How many workspaces are present in matlab??
Hi! Each function has its own workspace. If you write a function you will have a separate workspace to work in, without the v...

11 years 前 | 1

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How to use/skip multiple strings in a legend
Hi! Did you read this page? <http://www.mathworks.com/help/matlab/creating_plots/controlling-legends.html Controlling Legends...

11 years 前 | 0

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Matlab (R2012b) on windows 7 closing itself while running scripts
Hi! In your scripts do you use "exit"? This terminates matlab. If you only want to _exit_ a matlab script or function you nee...

11 years 前 | 0

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Regular expressions, words in a pattern
Hi! "\w" does not match spaces!

11 years 前 | 0

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How can I generate a matrix?
Hi! Loop over your a/b vectors and increase the specified matrix element: M = zeros(max(a), max(b)); for n = 1:le...

11 years 前 | 1

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已回答
simulation for an array
Hi! As far as I understand you want to create a movie? You can plot to a figure, capture the figure and play the movie like t...

11 years 前 | 0

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How to read a txt file containing letters and number
Hi! You can read in with textscan as strings and convert afterwards: % read file fid = fopen('plante1_no_head.txt'); ...

11 years 前 | 0

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How to prevent function output being overwritten in for loop?
Hi! Use arrays to save the results: % allocate arrays for results Energyin = zeros(JN-1, 1); Energyout= zeros(JN-1...

11 years 前 | 0

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Failure in look-up table / failure in my matlab
Hi! The help uses sfix(8) instead of ufix(8) and another scaling: <http://www.mathworks.com/help/simulink/slref/fixpt_interp1...

11 years 前 | 0

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How can i use threshold to convert a gray-scaled image into binary image ?
Hi! If you load an image into matlab, you get a matrix A (for example) of size (XxYx3) with X and Y being the number of pixel...

11 years 前 | 2

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Error using * Inner matrix dimensions must agree. HELP
Hi! My guess: You write T1 = mult * cos(kRca); If mult and kRca have the same length and you want to multiply elemen...

11 years 前 | 0

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Finding Indices of Duplicate Values
Hi! You may use "unique". The second output is the index of all unique values, e.g. in column 3. All other indices are duplic...

11 years 前 | 6

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Question about a script
Hi! You may not mix a script with a function in one file! If you want to write a function called "pos_vel", you have to save ...

11 years 前 | 0

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Multiplying a changing amount matrices.
Hi! I'm not sure if I understood correctly. You can concat N matrices into a 3d matrix with dimensions (2x2xN). Basically, yo...

11 years 前 | 1

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How to change a matrix as inserting zeroes both end sides?
Hi! Use diag: <http://www.mathworks.com/help/matlab/ref/diag.html?searchHighlight=diag>

11 years 前 | 0

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How can I plot coordinates with different colours based on the value and family of my variables ?
Hi! X = [2 4 -3 5 6]; Y = [4 9 1 -2 1]; L1 = [1 1 1 1 1]; L2 = [2 1 2 1 2]; L3 = [3 3 3 3 1]; L4 = [10 0...

11 years 前 | 0

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How can I generate a sample of 1-D random numbers following Gaussian distribution
Hi! It seems you already found your solution on file exchange. Why don't you use it? Your input function will be m=0;...

11 years 前 | 0

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comparing matrix elements and performing operation if equal
Hi! % get indices of unique values [~, ~, c] = unique(A(:, 1)); % loop over all unique values for n = 1:max...

11 years 前 | 0

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How to order values within a cell array more efficiently??
Hi! orderedratings = cellfun(@(x) ratings{3,x}, ... cellfun(@(x) strcmp(x,ratings(2,:)), ratings(1,:), 'UniformOut...

11 years 前 | 1

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Function/method to truncate the fractional part of a number in Matlab
Hi! To get the fractional part you may use fractionalpart = x - floor(x) Try it with "x=pi" for example. And try it ...

11 years 前 | 0

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Printing specific lines to a text file
Hi! If you read line by line with textscan, you should use '\n' as delimiter. fid = fopen(FileName, 'r'); FC = textsc...

11 years 前 | 0

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Problem of generating 4 sub-images
Hi! What exactly is going wrong?

11 years 前 | 0

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How to read large data file in Matlab?
Hi! Is it a binary file or a normal text file? For text files you may use "fopen" and "fgetl" to read line by line. If you kn...

11 years 前 | 0

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已回答
Help with csv data preparation
Hi! In your cell array the second and third entry of every line are numeric values already. You may split the string in the f...

11 years 前 | 0

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How can I delete certain rows of a matrix based on specific column values?
Hi! Suppose you have matrix M: % logical vector for rows to delete deleterow = false(size(M, 1), 1); % loop ov...

11 years 前 | 0

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Help in importing csv file
Hi! You may just load your file and process it afterwards like % load file fid = fopen('data.csv', 'r'); FC = ...

11 years 前 | 0

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已回答
Printing to specific lines in a text file
Hi! It is not difficult if the same columns are text and numbers. You can simply loop over all data and printf with "fprintf"...

11 years 前 | 0