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plotting data from multiple sheets by ID and day
fname = 'https://in.mathworks.com/matlabcentral/answers/uploaded_files/1300500/RLC_AD.xlsx' ; sheets = sheetnames(fname) ; ...

約3年前 | 0

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

3年以上前 | 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]'; ...

3年以上前 | 1

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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)...

3年以上前 | 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...

3年以上前 | 0

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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 ...

3年以上前 | 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...

3年以上前 | 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...

3年以上前 | 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:',...

3年以上前 | 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)

3年以上前 | 0

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

3年以上前 | 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...

3年以上前 | 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; ...

3年以上前 | 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)

3年以上前 | 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...

3年以上前 | 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...

3年以上前 | 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 ...

3年以上前 | 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...

3年以上前 | 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) ; ...

3年以上前 | 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*...

3年以上前 | 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) ;

3年以上前 | 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...

3年以上前 | 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...

3年以上前 | 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 = ...

3年以上前 | 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{...

3年以上前 | 0

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Find unknowns from inequations
Read about linprog

3年以上前 | 0

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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 ...

3年以上前 | 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...

3年以上前 | 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]

3年以上前 | 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 ; ...

3年以上前 | 0