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Preallocating an array or a vector in matlab before a for loop
Thanks is accepting and/or voting the answer. :)

casi 3 años hace | 0

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Preallocating an array or a vector in matlab before a for loop
N = 24 ; sigma_infty = zeros(6,N); eps_infty = zeros(6,N); for k = 1:N % sigma_infty(:,k) = [10*k 0 0 0 0 0]'; ...

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im modelling for two mass drive train , i could not able to know why an index exceed error
function dy= two_mass2(ta,te,k,d,jt,jg,y) x=y(1); y=y(2); dxdt=y(3); dydt=y(4); d2xdt2=((1./jt)*(ta-d*(dxdt-d*dydt)-k*(x-y)...

casi 3 años hace | 0

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How to compare each element of two arrays fullfilling a set condition more efficiently / quickly?
A = randi([0,5],10,1); B = randi([0,5],10,1); err = 0.5; [a,b] = meshgrid(A,B) ; idx = a<(1+err)*b & a>(1-err)*b ; r...

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Build arrays under the for loop
R = cell(10,1) ; for i=1:10 R{i}= nonzeros(D(i,:)); end You can access by R{1},R{2},...R{10}. R is a cell array. You ...

casi 3 años hace | 0

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How to exclude/extract empty rows/columns in a table?
T = readtable('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1288860/test_file.txt'); % Remove empty rows idx...

alrededor de 3 años hace | 1

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Error using tf The values of the "Numerator" and "Denominator" properties must be row vectors or cell arrays of row vectors,
Your numerator and denominator are sym class. You need to convert them to double using double. sys = tf(double(numerator) , dou...

alrededor de 3 años hace | 0

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How do I input names properly in a script?
height=input('enter your height in feet:'); weight=input('enter your weight in pounds:'); name=input('enter your first name:',...

alrededor de 3 años hace | 0

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how to convert a.mat file in to png?
Read about volumeViewer load('dataset_liver_bmodes_steatosis_assessment_IJCARS.mat') I = data(1).images ; volumeViewer(I)

alrededor de 3 años hace | 0

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How to convert symbolic output to numeric value in Symbolic Math Toolbox?
Read about double, vpasolve.

alrededor de 3 años hace | 0

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Animate a line in polar coordinates
In your case r is comlex number which is not allowed. You need to get r as shown below. theta = 0:0.001:2*pi; R = 1 ; x = R...

alrededor de 3 años hace | 0

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How to discretize the color in contour bar at smallest possible range?
% Make data for demo [X,Y,Z] = peaks ; vals = [0.000 0.005; 0.005 0.009 ; 0.01 0.05 ; 0.05 0.1; ...

alrededor de 3 años hace | 0

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How to plot the graph for a given signal over a range of frequency
w = [0 pi/8 pi/4 pi/2 pi] ; n = 1 ; x = cos(w*n) ; plot(w,x)

alrededor de 3 años hace | 0

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How to convert cell char array in Table With Column
You can use regexp to extract the data. load('Data.mat') [m,n] = size(Datawebsite) ; predictedClass = cell(m,1) ; maximum...

alrededor de 3 años hace | 0

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Using masking and native string functions to find the longest word in a string.
str = 'Today is a good day' ; s = strsplit(str) ; L = cellfun(@length,s) ; [val,idx] = max(L) ; longest_string = s{idx} ; f...

alrededor de 3 años hace | 0

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Maximum perpendicular distance between lines
You have to use the foot of the perpendicular formula. clc; clear all ; x = [120 150 180 210 240 270 300 330 ...

alrededor de 3 años hace | 0

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Indexing in complex cell arrays
% Make dummy data for demo a = cell(10,1) ; for i = 1:10 m = randsample(5:10,1) ; b = cell(m,1) ; for j = 1:m...

alrededor de 3 años hace | 0

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Generate a Random Point inside a box/plane
A = [0 0] ; % (p,q) B = [1 1] ; % (x,y) a = 50; b = 100; r = (b-a).*rand(1000,1) + a; x = (B(1)-A(1))*rand(100,1)+A(1) ; ...

alrededor de 3 años hace | 0

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How to plot This graph in matlab?
I have shown one plot for you reference. You may extend the same to others. x=1.0:0.1:3.0; y=-2.03*10^-3*x.^2+5.76*10^-3*x+1*...

alrededor de 3 años hace | 0

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Expected a scalar value. This expression has size [:? x 1].
Try this: % Sample Code tol = 10^-3 ; % can be changed idx = find(abs(sample.data1-values)<tol) ; max_index = idx(1) ;

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Fisher Discriminant analysis - issues with classes
You should use: % Compute mean of each class mu = zeros(k,C); % k = 3 i.e. number rows and C is number of classes i.e.5 for...

alrededor de 3 años hace | 0

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How to check whether point is inside high dimensional convex hull?
This link should help you: https://in.mathworks.com/matlabcentral/answers/101396-is-there-a-function-in-matlab-for-detecting-poi...

alrededor de 3 años hace | 0

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Extract area of matrices (lat, lon, data) by shapefile. "Requested array exceeds the maximum possible variable size."
You need not to use meshgrid. Already your lon, lat values are in meshgrid. Remove these lines: lat = %MyLat 8000x8192; lon = ...

alrededor de 3 años hace | 0

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extractin values from a struct that is in a table
rain = data.rain ; iwant = zeros(length(rain),1) ; for i = 1:length(rain) if ~isempty(rain{i}) iwant(i) = rain{...

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Find unknowns from inequations
Read about linprog

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How to find first 10 minimum values in a table array?
You can sort the array you want and arrange the other arrays/ table into that order. You can pick the first whatever number you ...

alrededor de 3 años hace | 0

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How do I plot values taken from a for loop function?
clc B0=-0.00356616 ; %Lapse Rate T0=518.67 ; B=B0 ; %Lapse Rate a=0.1:36089.2 ; %Altutude in ft T...

alrededor de 3 años hace | 0

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A general question about syntax regarding an Excel file's rows and columns in MATLAB
T = readtable(file,'HeaderLines',1) ; data = table2array(T) ; m = mean(data) [SL: fixed typo]

alrededor de 3 años hace | 0

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Filling area common to two inequalities?
clc; clear all; E11=0.041057; E12=-0.117734; E21=0.029952; E22=-0.042564; A=[1 -E22/E11]; D0=E11*E22-E12*E21 ; ...

alrededor de 3 años hace | 0

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Approximate Value Using Taylor Polynomial
syms x f = (sin(x).^2).*(cos(x)) T = taylor(f,x,'order',10) double(subs(T,5))

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