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If i have a random vector, e.g [2 4 3 4 3 4] how would i code a script to give how many times the max value is attained? I know the answer is obviously 3 here but what would the input be for any random vector? Many thanks in advance.
Easiest way: |nnz(u == vmin)|

거의 10년 전 | 2

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How can I find the location of the minimum and maximum
Others have explained how to get the index of the max or min, but I'm wondering if you actually want to know what the matrix is ...

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curve fit with ode bad fit ??
Ah. This may have been partly my fault for mixing notation (lots of t and x and y all floating around). A good check is to see w...

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Wrong coloring of legend in semilogx plot
I just tried an example in R2013b and it worked fine, but then I messed with it a bit and happened to get something very similar...

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Dynamic Variables in Loops
Yes, this has been answered before, and the answer is: <http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....

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Masking and removing green pixels
At the risk of being accused of shameless self-promotion... <http://blogs.mathworks.com/steve/2014/08/12/it-aint-easy-seeing-gre...

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Need help creating Easy function
<https://matlabacademy.mathworks.com/R2014b/ MATLAB Academy> can help you learn the basics of MATLAB. Or the "Getting Started" s...

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how can i stop while loop immediately by a push button?
When you say "i would like to stop it immediately by the button press", do you mean you'd like to interrupt the |imcrop| calls? ...

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curve fit toolbox help system ODE and excel?
If I interpret your problem correctly, you have a system of ODEs with a parameter -- y' = f(t,y;c) -- and an Excel spreadsheet t...

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How can I perform a curve fit using polyfit on an exponential decay model?
The problem is that when X is big, 3*exp(-0.5.*(X)) is very small. Because of how floating-point arithmetic works, that's OK as ...

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So apparently my textbook is out of date
What version of MATLAB are you running? (Enter |version| at the command prompt and it will tell you, if you're not sure.) The co...

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How to move a (x,y) line plot to the z axis?
Something like this, perhaps? x = linspace(0,1)'; y1 = cos(2*pi*x); y2 = x.^2; y3 = y1.*y2; ribbon(x,[y1,y2...

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Why this algorithm work only for 4 equations ?
Your |checkResult| function is returning something insufficiently close to zero. Given that it seems to be comparing the result ...

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How to find the border points for a set of latitude and longitude coordinates
You don't actually need Mapping TB to find boundaries. You can do it with <http://www.mathworks.com/help/matlab/ref/convhull.htm...

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Help me differentiate between two codes??
Ah, yes. This curious bit of syntax. What you ended up with was |sum(x)|! Why? Well, MATLAB evaluates the first condition |a <= ...

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I am plotting the logistic growth model using ode45,But I am confused because I am getting oscillation while I should get a constant line so do you think there is another routine could I use it or I need to change something to get the right plot??
The oscillation you're seeing is a standard numerical artifact that comes from using an explicit RK method. (Look at the scale o...

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how to write a function in interval?
<https://matlabacademy.mathworks.com/R2014b/ MATLAB Academy> can help you learn the basics of MATLAB. Also the <http://www.mathw...

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why do I get "Matrix dimensions must agree" when using "<"
Given the form of the error message and your comment that it works for a given value of |i| (presumably at the command line), bu...

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Iterating in a dataset encompassing a structure
If I understand the problem correctly, you're getting a dataset with variables |r0|, |r1|, |foo|, |potato|, etc, each one of whi...

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Solve two second order differential equations where initial values are known in a vector!
Are your equations correct there? It seems like the RHS should involve sqrt(x'^2 + y'^2) not x''^2 and y''^2. I'm going to assum...

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Finding indices when the curve stops decreasing
If you have Signal Processing TB, have a look at the <http://www.mathworks.com/help/signal/ref/findpeaks.html |findpeaks|> funct...

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How to set regexp expression for HH:MM dd.mm.yyyy format?
As an alternative suggestion, one approach is to pass the problem on to |datenum|: just pass the user's input along to |datenum|...

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demonstrating concept of confidence interval for the mean value?
Can you clarify your intent? It looks like you're doing 100000 experiments where you take 5 (n) random values in each experiment...

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Custom map coloring and legend in Matlab 2014b
I can't exactly replicate your problem because I don't have the files you're reading from, but I can get the same basic problem ...

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Reading Excel XY Data and Interpolate
This is a pretty huge question -- it really depends what you're assuming about the data and, consequently, what you're trying to...

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What does the value s do in my code??
This code is... a bit muddled. At the end of the day, the |s| is not really necessary. The problem you were having before with t...

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problem with overwritten data when auto saving
I'm not entirely clear on what the crux of the problem is. Are you trying to loop through the directories (nr, nr2, nr3) and wan...

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I am a beginner using figures and uicontrol
Your |button_callback| function declaration line is commented out, so you literally have an |Undefined function 'button_callback...

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