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how to find area under the curve ?
Use polyarea(x,y); you need to have a polygon; That is, ur first point must by ur lasr point. You can do so by adding this to ...

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min function on two arrays
% dS=min([cA(i+1,:),cB(i+1,:)])

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Concatenate variables with similar names
@Ricardo Duarte Here is a trick, you will save all your workplace into one variable b; then loop over all of them to take whose ...

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Scatter plot with colorbar showing density of points
You can for example measure the distance between all the coordinates, then take the inverse of minimum distance or average of al...

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How to combine n cell arrays into one giant one?
I think you need to loop a bit since you have cells of cells. Let A and B are ur outer cell matrices, data and labels ...

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Convert datetime to default format
% Use 'dd-MMM-uuuu HH:mm:ss'

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How to find the 12th highest value for every year
Since you already sorted them, what you need to do now is call the first highest 12 as follows % Assuming the matrix is...

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Indexing vectors in a cell matrix with for loops?
if true % You can either use this A{1}(1:3,:) %to extract the first 3 rows of the 1st matrix, and the same for all. ...

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How to check the complementary time-dependent term of differential equations.
% Try this function [T1,Y1] = ode_param_sample1() TSPAN = [0 pi/2]; IC = 1; tv = linspace(0,pi/2,10); ftv = si...

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How can call a vector element using index in the condition of if_else loop?
% A faster way R(m,1)=randi([5 40],length(m),1); R(n,1)=randi([5 40],length(n),1); R(o,1)=randi([5 40],length(o),1); ...

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How can call a vector element using index in the condition of if_else loop?
% Try this R=P(:,6); m =find(R==40); n =find(R==25); o =find(R==15); p =find(R==8) for k= 1:6160 if ismember(k,...

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질문


RL in dynamic environment
I am trying to apply RL in marine environment. An example is when a fish swims toward its altimate goal, it should avoid bad wea...

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How do i turn my 4D matrix into a 3D matrix
I think you cannot convert 4D matrix into 3D if non of the dimensions is equal one. If A is of size (100×50×1×20) lon, lat, ...

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Exporting a 3D array to python
Ths simplest way is to export it as .dat file where python can read it too. % example x = rand(100) save file.dat x -a...

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How to remove horizontal lines as plotting 0-360 degree map
Make sure to clear the figure before plotting because the coast.mat does not have these lines.

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Given an integer number n (0<=n<10000), write a code returning the difference between the product of its digits and the sum of its digits.
% check this a = 4321; b=str2num(num2str(a)'); diff = abs(sum(b)- prod(b))

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How to break loop when successive values are too close
check this example; % examle tol=1e-4 xold=1e10 for i =1:100 xnew = .... if abs(xnew-xold) < tol break end xold=...

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Read NaN data from excel file
click on import and choose the xls file

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Plot contours using discrete data points
% try this contour(X,Y,Z) or % this contourf(X,Y,Z)

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Saving output of a for loop for each iteration
% code u=unique(condIds,'stable'); for ii = 1:length(u) myTrials{ii} = find(condIds == u(ii)); map = d.mkSal...

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putting a threshold into array values
Assume your matrix is A, and b is the threshold % code B= A(A(:,2)>b,:);

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How can I subtract the absolute value of the original image from the absolute value of the resized image to compare and to find the error in Matlab
No you resize the image it takeout part of the pkls, so the size of the matrices will for sure be smaller. Thus u cannot find th...

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Trying to plot number of iterations vs gridsize for steady state
Hi, this looks like a diffusion equation solved by FDM. you had to mistakes, I already corrected them, n is the step size or gri...

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How to keep constant weights in a Neural Network?
Assume u have 5 inputs 10 ne. (for only on hidden layer). First, generate yourself a random matrix of size 5x10, then save it. ...

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How is it possible to plot the average of a vector that has a different size in each iteration?
Finding the minimum length ( assum it is 10) , then use the moving average ( smoothing) all the other results to get all of them...

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