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How can I use data (range of ages like 70-75) without matlab calculating that array for the command "legend"?
G(1,:)

5 years ago | 0

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How to create a loop for iteration?
e=2.7183; gamma=0.1333; k = [1,9,23,7,23,9,20,29,63,102,73,59,27,130,75,185,70,92,326] ; Rt=0:0.01:10; P = zeros(length(k)-...

5 years ago | 1

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Answered
Plotting lines on the same graph
x1 = 0 ; y1 = 0 ; x2 = 1:10 ; y2 = zeros(size(x2)) ; x3 = zeros(1,10) ; y3 = 1:10 ; figure hold on plot(x1,y1,'-*b') ; ...

5 years ago | 0

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Answered
Load mat files matching specific string inclusive of different strings
matFiles = dir('*.mat') ; matFiles_name = {matFiles.name} ; idx = find(~cellfun(@isempty,strfind(matFiles_name,'2015'))) ; ...

5 years ago | 0

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Answered
Is it posible to change the number of digits Matlab works with?
You can convert them from double to single. Read about the function single. Also have a look on the function format.

5 years ago | 0

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how to change value in element
Let P be your 10000x1 array. p0 = p ; % To change data from 4901 to 4949 for i = 4901:4949 p(i) = (p(i)+p(i+1))/2 ; e...

5 years ago | 0

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How can I operate a matrix by a vector?
A = [2 3 ; 1 -2 ; 4 1]; b = [2,4, -5]'; syms x1 x2 x = [x1 ; x2]; f = (sqrt ((A * x-b) .^ 2)) .^ 2

5 years ago | 1

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assigning of multiple arrays
Read about deal. [ss1, ss2] = size(0:1:38); zitaa = ones(ss2,121); [rhoo,thetaa,thetaa1,thetaa2] = deal(zeros(ss2,121)) ;

5 years ago | 0

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Answered
How do I make two vectors of different length equal in length
A=[1 2 3 4 5 6 7 8] B=[5 6 8 1 2 3 7 4 55 66 88] ; B = B(1:length(A))

5 years ago | 0

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Answered
Contour Plot gives error
You cannot use contour with column data. You can use scatter to plot data or if your data is gridded consider using griddata or ...

5 years ago | 0

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Using epsilon in legend
plot(rand(1,10)) legend('\epsilon_2_1/\epsilon_1_1');

5 years ago | 0

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Incorrect dimensions for raising a matrix to a power
x=0:0.01:4 y=1./(sqrt((1-x.^2).^2+(4*0.01^2*x.^2)))

5 years ago | 1

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Replace stale / repeating data with NaN in a table
Var1 = [ 3 , 2, 5, 4, 4 , 4, 4, 6, 2, 3 , 5, 5 ,5 ,5 ] ; % Var1 = [ 3 , 2, 5, 4, NaN , NaN, NaN, 6, 2, 3 , 5, NaN , NaN ,NaN ] ...

5 years ago | 0

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Answered
How to loop through multiple text files and make plot for each one in a single script?
txtFiles = dir('*.txt') ; N = length(txtFiles) ; figure hold on for i = 1:N %Open and read txt file fid = fopen(t...

5 years ago | 0

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Replace number with text
Instead of a string, you can try replacing it with NaN. % finding positions of number 5 from table A. [i1,k1]=find(A==5); %...

5 years ago | 0

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Import multiple excel with different column size
xlFiles = dir('*.xlsx') ; % you are in the folder of files N = length(xlFiles) ; % Total number of files iwant = cell(N,1)...

5 years ago | 0

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How to remove rows in table that have empty values
Let T be your table. idx = ismepty(T.(2)) ; T(idx,:) = [] ;

5 years ago | 0

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Can you help me with the MATLAB code?
LEt a, b, c be your coefficients and (x,y) be your data. y0 = y ; % given data y1 = a+b*x+c*(x.^2-1) ; % approximated...

5 years ago | 0

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How can I convert .mat file to .shp file?
Read about shapewrite. Refer this as an example: https://in.mathworks.com/matlabcentral/answers/419530-creating-a-shapefile-fr...

5 years ago | 0

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How to substitute one value in vector by vector?
x=[-1 1 -1 1] ; iwant = cell(1,length(x)) ; for i = 1:length(x) if x(i) == -1 iwant{i} = [1 2 3 ]; ...

5 years ago | 0

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Answered
how to set legend in matlab
% Auto A = rand(10,2) ; plot(A) legend % Manually plot(A) legend('first','second')

5 years ago | 1

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Answered
How to split a certain class of images in folder(image dataset contains more than 10,000 images) having different classes into separate folder or location.
T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/747179/FETAL_PLANES_DB_data.xlsx') Now you can ex...

5 years ago | 1

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row of a random size matrix
A = rand(5,4) ; a = num2cell(A',1) ; A(1,:) a{1}

5 years ago | 0

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Finding the mean at each interval
T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/746119/Data.xlsx') ; Temp = T.Temp ; V = T.V ; ...

5 years ago | 0

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How to extract data of a region using shapefile?
Read about inpoly.

5 years ago | 0

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Using while loop in normalized matrix
x = 0 ; y = 0 ; a = 0.2; b = 0.3; while ~(x == 1 && y == 1) c = rand ; d = rand ; m = [a c; b d]; d=nor...

5 years ago | 1

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Answered
extract data in specific interval
Let thedates be your datetime array. [y,m,d,h,m,s] = datevec(thedates) ; iwant = thedates(y==2020) You can also use inequal...

5 years ago | 0

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I have a 2 dimensional array. I want to view it.
x = trajectories(:,1) ; y = trajectories(:,2) ; plot(x,y)

5 years ago | 0

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I need help about the imbalanced data
Read about readtable. After reading you can access the rspective columns using T.T1, T.T2 etc... or T.(1), T.(2) etc. T = re...

5 years ago | 0

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Answered
how to read images from subfolder of a data base and train svm cllasification
https://in.mathworks.com/matlabcentral/answers/437494-how-to-loop-through-all-files-in-subfolders-in-a-main-folder https://in....

5 years ago | 0