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Calculating the averages of different groups of values
x=[3 3 3 4 4 5 5 5 5 3 11]; y=[1 2 4 5 7 1 1 8 10 10 1]; groupBounds=[0; find(diff([x(:); NaN])~=0)]; groupAverage=a...

9 years 前 | 1

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Indexing polynomials using 'for' loop
%% Solution 1: (not recommended) p1 = [0 2 0 -2 6 -1]; p2 = [1 3 0 -2 0 0]; p3 = [0 0 3 1 0 -10]; p4 = [0 0 0 -4 1...

9 years 前 | 1

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How to evaluate a derivative of a function at a point?
because subs replaces x with one. Doesn't evaluate. So diff( cos(x) -x ) returns -sin(x) -1 and then you replace x with one and...

9 years 前 | 7

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fsolve to find circle intersections
% Center of the circles C1=[0,0]; C2=[5,0]; % Radius of the circles R1=3; R2=5; % x1(x,y) on the...

9 years 前 | 0

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How to generate two subsets randomly from a matrix without repetition?
So we have matrix A with 10 elements. We want to randomly divide it into two *non-overlapping* subset, one with 4 elements anoth...

9 years 前 | 2

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Can I write a Genetic algorithm code for multiple choice questions?
use MATLAB's <http://www.mathworks.com/help/gads/ga.html GA()> command. Since you have four choices, then you are pretty much i...

9 years 前 | 0

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Sum of duplicate dates in an array
I would use <http://www.mathworks.com/help/stats/grpstats.html grpstat()> as follow: if you just want to sum by the group her...

9 years 前 | 0

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Find the rows in matrix B that contain the two numbers in each row of matrix A, in every possible order
have you considered parallel processing? You could start MATLAB parallel workers using: parpool % if you don't it would ...

9 years 前 | 2

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how can I use my function on 3*3 blocks?
inputData=zeros(10,10); inputData(randi(100,[15,1]))=1 inputData = 0 0 0 0 0 0 0 ...

9 years 前 | 0

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replace number by string
Well, a quick solution would be: valueCell={ 23,23,23, ... 9997,9997,9997,9997,9997,9997,9997, ... ...

9 years 前 | 0

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Choosing the best parameters for strategy with genetic algorithm
Let's say you have successfully coded strategy function which provided seven input parameters, it would give you the 'Sharpe Rat...

9 years 前 | 0

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how to select data based on month
Here is what you should do: I have assumed that you store those two columns in a csv file as follow: % reading t...

9 years 前 | 2

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Surface plot based on cell center values
Data=rand(10,10); imagesc(s); check <http://www.mathworks.com/help/matlab/ref/imagesc.html imagesc()> for detail des...

9 years 前 | 1

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Table "Vertical Lookup", how to do it?
Look up <http://www.mathworks.com/help/matlab/ref/join.html join()> and <http://www.mathworks.com/help/matlab/ref/outerjoin.html...

9 years 前 | 0

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GA in Matlab 2014???
Since you have discrete values for x1 to x5 you need to define it as an integer problem. (I know x1,x2,x3 are not integer input ...

9 years 前 | 0

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merge two tables in matlab
% Creating Table1 T1=table(['A';'B';'C'],[2;5;6],[3;7;8],[4;8;6],'VariableNames',{'SampleName','P1','P2','P3'}) T1 = ...

9 years 前 | 2

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Insert rows from one matrix into another
use <http://www.mathworks.com/help/matlab/ref/sortrows.html sortrows()> command as follows: A = [2373 259 18.10 23.80 0.20...

9 years 前 | 0

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how to create 1*101 of some integer array?
Yo have: A = zeros(1,101); and then later you have cumtrapz(x,-4*A); all elements of *A* are zero so *-4*A* is ...

9 years 前 | 0

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How to assign a particular value to each element of a structure array for a particular field?
n=3; %initilizing some test structure s=struct('f',cell(n,1)); % generate r vector r=mat2cell(rand(1,n...

9 years 前 | 0

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How do I access structrure fields from input parser optional inputs
That's not how *varargin* works if you have function ptest(s1,varargin) .... end then once you call it as: ...

9 years 前 | 0

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My matlab code is giving me this error "Too many outputs requested". If someone can help me solve this?
Don't know why *cloud = cloudiness{matchrow, 2};* is causing too many output request error. Are you sure the error is for that l...

9 years 前 | 0

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Sum of Cells next to a String
% creating sample data data={'VLGMC', 1, 'DLG', 4, 'a', 7; ... 'VLGMC', 2, 'c', 5, 'a', 8; ... 'b',...

9 years 前 | 0

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Could fsolve cause trouble when using it to solve linear equations?
Yes, you can, but if you have linear system of equations you have much better and optimized function for system of linear equati...

9 years 前 | 0

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Create variable from cell array based on strings
Var1={'A',6; ... 'B',7; ... 'B',7; ... 'A',8; ... 'C',10; ... 'A',9; ... ...

9 years 前 | 0

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matrix to vector matrix ?
a = [111 ,101, 100]; num2str(a,'%d') ans = 111101100

9 years 前 | 1

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How to minimize a parameter in a differential equation
Here is the outline of the code for objective function objectiveFunction (Conductivity) -- Use the above code you mentio...

9 years 前 | 0

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提问

possible Bug? or checking if OverFlow happened?
I have a matrix of size (6472908 x 67) all single values. Different columns have different max/min (there are different variable...

9 years 前 | 3 个回答 | 0

3

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Speed up stepwise averaging
if the indeces in the index variable are like your example next to each other you can take advantage of that. Here is the timing...

9 years 前 | 1

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提问

GA Ignores Initial Population and Initial Scores
I am trying to optimize a function which accepts over 1300 parameters, (all integers between 1 and 13). The output is a score wh...

9 years 前 | 1 个回答 | 0

1

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Plots of Savitzky-Golay
do it like this plot(x(1:length(SG0)),y(1:length(SG0))','k','LineWidth',2.5); hold on plot(x(1:length(SG0)),SG0','r',...

10 years 前 | 1

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