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Cramer's Rule Homework Help
What you wrote in there should work. I am guessing you are actually having trouble with syntax. data = xlsread('sole_ex1.xls...

11 years ago | 0

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Can someone help me setup the Chandrasekhar H-equation in Matlab?
I will tell you 2 things: 1) x is most definitely a vector. 2) The NxN matrix is obtained by writing the summation over j ...

11 years ago | 0

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linear regression statistical parameters
There is a good chance there are other things wrong with your problem, but first off, it is: [b,bint,r,rint,stats] = regress(...

11 years ago | 0

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Need to write a function that rotates cartesian coordinates
Look up rotation matrix or transformation matrix on Wikipedia. Your final function should take coordinates matrix and angle, and...

11 years ago | 0

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How to find the difference between two graphs?
One way is to interpolate the 59x2 matrix to be 149x2. Check spectral interpolation using Fourier transforms. You might even be ...

11 years ago | 0

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Can MATLAB be used in Arduino Applications?
http://www.mathworks.com/hardware-support/arduino-matlab.htmlhtml I would still suggest C or LabVIEW(beginner friendly) for A...

11 years ago | 0

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How to draw same size rectangle on different image location
This is a filter operation. I am 95% sure you cancan get away with using imdilate with a circle or square structral element of y...

11 years ago | 0

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Comparing two non periodic signals (signal shift)
Import your signals as A and B using the wizard. Also import the time information (x-axis) as T. X=(ifft(fft(A).*conj(fft(B)...

11 years ago | 0

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Can any one explain what is the exact difference between PCA and MPCA, and how to apply the MPCA ON face images
The very same page you copy pasted that explanation from has 2 decent references of a code and example. <http://en.wikipedia....

11 years ago | 0

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Find brings back empty matrix
That is because a number cant be bigger than 60 and lower than 40 at the same time: L<40 & L>60 You need to figure out wh...

11 years ago | 1

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Is this possible to convert a thick line or curve into its thinner version
Take an image with the best exposure possible, having high contrast between the paper white and font black. Use a simple treshol...

11 years ago | 0

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How to fit a curved surface to 3d data
First off, many of your questions above about when to decide what curve to use, where to stop, where to mark data as outliers ar...

11 years ago | 0

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How can histograms for multiple images be stored to one .mat file in Matlab?
save('Hist.mat',Hist1,Hist2); Or you can go memory mapped and say: save Hist.mat Hist1 -v7.3 m = matfile('Hist.mat','W...

11 years ago | 1

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Labelling edges in an image
For this particular image and any image with a similar enough trivial nature, there is a very short solution: A is your image w...

11 years ago | 0

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Convert from cell to string
Do you specifically need it to be a cell array at the end? Why not just use a recursive string concatenation? Something like: ...

11 years ago | 0

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I am new to MATLAB are simple files saved in 2014 format compatible with 2013 (ie no advanced functionality)
Yes, they will be. You can also check the function "save" and its flags to maintain compatibility with even older versions of MA...

11 years ago | 0

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Probability of gray level in an Image
npx=0; count=0; for i = 1:5 [pixelcount greylevel] = imhist(image(i)); count=count+pixelcount; npx=npx+numel...

11 years ago | 1

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index out of bounds
I don't have the Global Optimization Toolbox, but I went through your code and my first impression is that your problem could be...

11 years ago | 0

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Matlab is scripting language or programming language?
http://stackoverflow.com/questions/17253545/scripting-language-vs-programming-language is a discussion in general about the d...

11 years ago | 1

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How to detect which rows are left in the matrix when the unique function is used to eliminate the repeated rows?
[C,ia,ic] = unique(A,'rows')

11 years ago | 0

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Reflect a triangle given a mirror line
Look at householder reflectors on wikipedia. The function "flip" might also help.

11 years ago | 0

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how to transfer a complex valued matrix into excel?
One way would be to transfer them separately, using real and imag. I am not sure if that presents a problem for you. You would t...

11 years ago | 0

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How to change marker colors in Scatter3 plotted with patch
You can change the marker shape and size from the GUI. If you want to see how it would be done in-line, do the changes in GUI, t...

11 years ago | 0

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How to add two binay images and add the result to a third image?
Here is how to make a loop for that: R(:,1)=I(:,1)+I(:,2); %Initialization for i=2:4 R(:,i)=R(:,i-1)+I(:,i+1); %This i...

11 years ago | 0

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Attempted to access indx(1); index out of bounds because numel(indx)=0.
That means check sometimes don't have any 0 elements when you do [indx,dum]=find(check==0); Try instead: if length(in...

11 years ago | 0

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Selecting two different periods for variable / calibration data
There are better ways to do this, but the way that needs the less thought and the way you would understand the fastest would be:...

11 years ago | 1

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How to plot multiple streams of data in real-time?
More details would help. So far, the only thing I can suggest is to check "drawnow".

11 years ago | 0

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Interpolate Vectors into rotated grid
I would first stretch your original grid to be uniform in all directions. Then do planar rotation twice to obtain the new grid. ...

11 years ago | 0

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How to select all .wav files from a directory?
files = dir('*.wav'); audio = cell(1,125); for k = 1:125 audio{k} = audioread(files(k).name); end

11 years ago | 2

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Ceate a x b matrix (or 2D array) from 2 1Darrays, and populate each cell from another array
[X,Y] = meshgrid(xgv,ygv) is your friend. You can also do it another way, let say your x range is 1 to 5 and y range is 1...

11 years ago | 0