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Principle Component Analysis Computation
they are the same because the eigenvector (-.7532 0.6779) is equivalent to (.7532 -0.6779)

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First time matlab user problem Matrix dimensions must agree?
imgspec and filter must have the same dimension to do a element-wise multiplications size(imspec) size(filter)

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New Linear Model Class
I just need to take a moment to say how much I love the LinearModel class. Whenever people said they were using R or SAS for the...

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How can I create a loop using date form ?
Not sure if this is the range you wanted, but you can change start and end date to what you like start_date='2/04/2013 0:00...

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Question about graph data
you just need the location of the maximum value. [tmaxinner locmax]= max(u(:,1)); timetaken = t(locmax,1); this wou...

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How can I transfer data from one GUI to another one?
You can also use a global variable or pass the value via the callback function. The callback function in this case is the funct...

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import data from excel into matlab gives false date
matlab and excel use different dates to as a starting reference. You just have to add 693960 to the excel date numbers Excel:...

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Order in combined financial time series
I don't have the financial toolbox, so it's hard to know exactly what's going on. You can use orderfields and specify an array w...

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dataset arrays - extract and reconstruct variables
your notation is a little off x=dataset({array1.var, 'var1'}, {arrray2.var, 'var2'}} or if var is a string containing th...

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How do a read a text file as fixed width columns as in Excel?
The sum of all of your spacing is 93, so you would need 93 characters per entry. The data above has 37, 57, & 57 characters in e...

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Easter eggs as Matlab code
Okay here is my egg so far. I would like to have a fancy color map, but I thought others might like to make one. I used Dan's po...

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Is matlab suited for game development?
Short answer no, you would need to buy the Matlab compiler to do this (big $$) and MatLab is not great for GUIs in general

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Conversion to cell from double is not possible
It is very hard to tell your problem from this about of information. I can only guess that Output is a cell array and you are tr...

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diagonal matrix with ones
a(eye(3))=1; like that?

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How can I use subplots with an inside function?
make sure you don't have a close or figure command inside of polygon you could always try to step through with debugger to fi...

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How can I combine values from different columns of a matrix into one single column?
it would be helpful to see you code so far, but i think this is what you need. A is your original matrix (nx3) Anew=A(:,2);...

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Looping through Structure Elements
Because you are referencing Electrical.Twelve.February before it's created. I'm not sure what your code is trying to do, but ...

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Too many input arguments
You must be inputting too many arguments when you call the func. Make sure you are only inputting six arguments. What are you ex...

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grpstats with nan values
so I thought you use nanmean and nansum to ignore nans with grpstats, but it seems that it always ignores them. I want a nan to ...

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Matlab Guide Table. Need Help. Thanks
You might want to start here. http://www.mathworks.com/help/techdoc/creating_guis/f3-998197.html If you are familiar with ...

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How and why Matlab defines maximal values for gcf's position (width and height)? It looks like these values are screen resolution dependent ...
figure;plot(1:10) set(gcf, 'Units','normalized','Position',[0 0 1 1]); %fullscreen position is a percentage of your scre...

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How to write multiple if statements
looks like you have an end before all your elseif's that shouldn't be there. It helps to smart indent your code when doing neste...

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Alternative to xlsread from website data on mac: matlab R2012a
To change the file type you can use a dos command dos('move BPA_BRD_data.xls BPA_BRD_data.csv') I prefer to bring my exc...

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How to access specific data when using "getfield"
You can reference the field of a structure dynamically with Charge.Curve1 or Charge.('Curve1') Loren has some nice blog posts o...

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how to efficiently find the indices?
Matlab has a nice function built in for this [B,I,J] = UNIQUE(...) also returns index vectors I and J such that B = A(I...

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eomday extension for wrapping month numbers
eomday([2012, 2013], {3:12, 1:3}) would work like this eomday([repmat(2012,1,10) repmat(2013,1,3)], [3:12 1:3]) Us...

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Matlab Database Toolbox
I don't see a join in the tool you can just write the SQL for it. Generate the M-file from a basic query then just add you join ...

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Error "Too many DATANAMES" for number series
It's definitely not too big. I bring in sets much larger than this all the time. I've never used the FTStool, but sometimes when...

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Ski Jump HELPPPP
I'm pretty sure you want to set up A as the system of linear equations like this A=[0 0 0 1; 1 1 1 1; 0 0 1 0; 3 2 1 0] ...

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deleting selective multiple rows from a data matrix
couple of problems B<2 & B>3 is always false you need to use a logical index to filter rows of A, B is not logical (all...

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