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Regarding 3D plots with Matlab
So what kind of visualization do you want at the end? Do you want a surface? In which case you could do something like x ...

15年以上前 | 0

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Regarding 3D plots with Matlab
I'm not sure I understand what you're after. It sounds a bit like plot3(parameter(1),parameter(2),Number,'o')

15年以上前 | 0

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bar graph
Rather than use |hold|, why not do h = bar(1); axis(...) outside the loop, then in the loop do set(h,'YData',i)

15年以上前 | 0

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How can i store multiple data into same excel file ?
I'm going to assume that the issue is that you want to run this code again later (with different data), so you don't necessarily...

15年以上前 | 0

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How to convert string to time?
If you want an actual decimal minute value: x = '04:55' y = str2double(regexp(x,':','split')) z = y*[1;1/60] (Leave off ...

15年以上前 | 2

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New column
I think this does what you want: Price = randi(10,20,1) buy = [true;diff(Price)>=0]; idx = find(~diff(Price)); buy(idx+...

15年以上前 | 0

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colorbar
You can change your colormap to have more colors. The default is 64. colormap(jet(128))

15年以上前 | 0

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import time
You can use |textscan| to read arbitrarily formatted data from a text file. If you want to keep the values between the colons s...

15年以上前 | 0

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Fliplr and flipud functions no longer accepts vectors
|ismatrix| is true for a vector or even a scalar -- everything in MATLAB is a matrix unless you force it not to be (eg a 3-D arr...

15年以上前 | 0

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how to read a data file with textscan when the the data type is inconsistant
A simple hack workaround would be to read the first column as a string, then remove anything non-numeric from that string and co...

15年以上前 | 0

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Definition of function
Are there any lines of code above the function definition line? That will generate that error message. For example: filen...

15年以上前 | 0

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What should take the longest time to run in matlab?
Just to mess with you, there are some other subtleties about the way MATLAB handles passing data to functions, which will come i...

15年以上前 | 0

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Select rows from txt file
How are you going to store the data once you get it? Do you just want the text? Or do you actually want to read in data? If t...

15年以上前 | 0

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Lagrange Interpolation code
Hmm, maybe you should form a study group with <http://www.mathworks.com/matlabcentral/answers/3338-lagrange-interpolation-m buxZ...

15年以上前 | 0

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loop
The |n| th row of the matrix variable |AF|. The colon stands for all indices, and MATLAB indexes by row-then-column. Hence, |A...

15年以上前 | 0

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How to read information from a txt file header?
Assuming the header information is always the same format (or at least same number of lines): fid = fopen('data2.txt','rt'); ...

15年以上前 | 1

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Solving nonlinear scalar ode's
Given that you have to use AB2 (with, apparently, a fixed stepsize) I going to take a guess that this is a numerical analysis ho...

15年以上前 | 0

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texscan multiple variables
fmt = repmat('%f',1,30); d = cell2mat(textscan(fid,fmt));

15年以上前 | 0

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Headers in Matlab
Perhaps <http://www.mathworks.com/help/toolbox/stats/datasetclass.html |dataset| arrays> are what you're looking for? The synta...

15年以上前 | 3

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ring (annulis) patch?
How's this? The patch is a single object, but you have to add the edge lines separately in this approach (otherwise you see the...

15年以上前 | 2

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Writing an M-file for an iteration of x=cos(x)
Check out <http://www.mathworks.com/matlabcentral/answers/1148-how-to-learn-matlab this discussion> for some suggestions on lear...

15年以上前 | 0

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Reading a multi line string into a single string
You can read the whole contents of a file using <http://www.mathworks.com/help/matlab/ref/fileread.html |fileread|>. Then use <...

15年以上前 | 0

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Can I call this plot as Contour plot?
What you're doing is called a parametric plot - x(t) against y(t) for a parameter variable t.

15年以上前 | 1

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Curve fitting with no input give
Do you mean that you have data but no idea about the curve to fit? If so, there are nonparametric methods available, such as LO...

15年以上前 | 0

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Converting an image with size of [X, Y, 3, double] to another image with size of [X, Y, 3, uint8]
Assuming the double image has values between 0 and 1, A2 = uint8(255*A1);

15年以上前 | 0

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How to read multiple huge text files, the fastest way?
If you have to read it as ASCII, your best option is |textscan|, which will read directly into whatever numeric format you speci...

15年以上前 | 0

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import tab and comma delimited dat file
I'm not sure if the formatting is exactly how it appears above, but you can probably iron out the kinks yourself. I did assume ...

15年以上前 | 0

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Nonlinear regression
From the doc: "nlintool(X,y,fun,beta0) is a graphical user interface to the nlinfit function, and uses the same input arguments"...

15年以上前 | 1

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Algorithm to match continuous variables
I'm not completely sure if you want just to extract a subset of data, or group all samples into a set of bins. The former you c...

15年以上前 | 0

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MATLAB vs. Excel: Matlab seems to give better answer to exponential decay, anyone know why?
Excel is apparently doing a log of the y data then fitting a line. This approach is very sensitive to outliers. Change your |p...

15年以上前 | 3

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