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Loading .mat file problem
Assign the data to a variable e.g. Data or Data1, Data2 ... if there are more than one file, and access the data using a dot o...

3 years 前 | 0

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Why are my line plots are coming out improperly?
h4 and h8 line plots contain 2D matrices clc;clear;close all; %for head on collision L= 4; D= 3.860; lam= 0.397; % lamda...

3 years 前 | 0

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Fourier Series Integration in terms of Pi
Hi @Bob Gill, the value of bn can be computed as follows syms t n 'integer' an = (1/pi)*(int(-1*cos(n*pi*t/pi),-pi,-pi/2)+int...

3 years 前 | 0

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Calculate the temperature distr
Without knowing more about the governing equations , its difficult to say about the process involved in your problem definition....

3 years 前 | 0

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Getting error when i use a self define function in a for loop
As the error states, Index exceeds the number of array elements. Index must not exceed 25. the length of InputStr is 25, you ne...

3 years 前 | 0

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Draw edf plots using "for loop"
"Data" will likely only kept the last record of the signals, which are in the "50 sec", Please look at the below code where w...

3 years 前 | 0

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How to assign different scales between different ticks in axis?
t = linspace(0,10,5); ax = axes; f1 = exp(0.5 * t); f2 = exp(t); plot(ax, t, f1) hold on plot(ax, t, f2) grid on ax....

3 years 前 | 0

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Mesh plot, not able to match size of Z and X
t=0.2; p=1; for kx = -3:.1:3 q=1; for ky = -3:.1:3 energy_ary(p,q)= -2*t*(cos(kx)+cos(ky)); y_ary(q)= ky; q=q+1; end x_...

3 years 前 | 0

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Ode45 calling a matrix and an array in a function
Change this line q = zeros(4,length(ts)); To q = zeros(1,length(ts));

3 years 前 | 0

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readcell error for CSV file in MATLABversion 2022a.
readcell("rte_ioc_map.csv")

3 years 前 | 0

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How to display matrices in cell array in a table?
Hi @JingChong Ning you can use array2table & cell2tmat together to display cell array content present in the table as shown b...

3 years 前 | 0

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Access and extract table array using for loop
tt = edfread('example.edf') tt = timetable2table(tt); tt.Properties.VariableNames = {'Time','ECG','EEG2'}; for k = 1:length(t...

3 years 前 | 0

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fprintf with two variables goes completely through the first variable instead of alternating
x=[1 10 42 6 5 8 78 23 56 45 9 13 23 22 8 9] [xgt10row,xgt10col]=find(x>10) disp('element location of values of...

3 years 前 | 0

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The 'diff()' function is running incorrectly in this program (Error using diff Difference order N must be a positive integer scalar)
T_stop=10; T_sample = 0.002; x0 = [0;0;1/2*pi;0]; options=odeset('RelTol',1.0e-6,'AbsTol',1.0e-6,'BDF','on'); [t,x]=ode45(@(...

3 years 前 | 0

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Plotting the graph of (4*x*sinx − 3)/(2 + x^2 )
Use the element wise division for the equation x=linspace(0,4,400); y=((4.*x.*sin(x))-3)./(2+x.^2); %^ ...

3 years 前 | 1

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how would i write script to graph the 't' and 'y' values?
figure; load('ALL_DATA.mat','Box40'); subplot(3,1,1); % use the struct name to access the t & y variables plot(Box40.t,Box4...

3 years 前 | 0

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How to plot data of only specified rows of matrix
The load function imports data to a struct which contains the variables. To access them you need to use a dot operator, Shown ...

3 years 前 | 0

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Unable to exportgraphics or saveas: The value of 'destination' is invalid.
savefig(gcf,'ab.fig') Try using savefig

3 years 前 | 0

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How to improve the calculation accuracy of Matlab?
you can use, smoothdata on the resulting matrix l=4; l1=l;%Tx Mode l2=l;%Rx Mode misalignment = -1:1e-3:1; result = zeros(...

3 years 前 | 0

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im trying to display grade scores and their letter grade.
for i = 1:length(s)

3 years 前 | 0

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who do I keep getting this message? Index in position 1 is invalid. Array indices must be positive integers or logical values.
Moment=zeros(); ki=pi/180; kinc=pi/180; kf=pi; ji=5; jinc=5; jf=100; K = ki:kinc:kf; J = ji:jinc:jf; for k=1:numel...

3 years 前 | 0

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Why find doesn't work?
K=[1 2 3 4 5] K(K>=2.7 & K<3.1) % this works, matlab gives 3 Assignment_L(12,1)=2.7; % this equals 2.7 Assignment_U(12,1)=3...

3 years 前 | 1

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make loop if two variable (x and y) present calculate value for (x1 and y1) and store separate name for same formula another calculate for (x2,y2) and store by separate?
x = [1 2 3 4 5]; y= [ 8 3 2 1 6]; % vectorize the equation (easier approach) z = exp(x)+x.*y.^3 +y; % using for loop h...

3 years 前 | 1

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How to insert different size matrices into each row of a zero matrix
syms x [1 10] n = 10; for k = 1:n M(k,1:k) = x(1:k); end M

3 years 前 | 0

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Convert Fahrenheit to Celcius while the inpu Fahrenheit is an array
clear T = 0:10:100; C = (5*(T-32)/9) fprintf('%4.2f F = %4.2f C\n',[T;C])

3 years 前 | 0

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How to solve the error while solving the given equation by ode45 or ode15s?
As the expression states an extra parenthesis is included in this line dTdt(i,j) = k*(Tin(i,j)-k*T(i,j))+(k4(i,j))*T(i,j+1))-k...

3 years 前 | 0

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Custom Lognormal curve fitting equation using curve fitter in matlab
complete the if-else-end condition using the keywords end , else-if and try, Also in the if condition, there is a missing mul...

3 years 前 | 0

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Wind rose plotting issue
v=[5 15 4; 1 0 0; 13 5 3; 7 0 0; 10 1 2; 11 0 0; 19 2 1; 1 0 0]; %Percentage of winds d=[0 0 0; 45 45 45; 90 90 90; 135 135 1...

3 years 前 | 0

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Only the last value are being stored in for loop
a(iComb)=ExtSurgeBinEdges_Lo(IndMatFA(iComb,1)); b=[]; % put this line outside of loop b(iComb)=ExtSurgeBinEdges_Md(Ind...

3 years 前 | 0

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I cannot detect an error on Newton Method.
function [x,n,error] = NewtonRaphson(f,a,eps_f,eps_x,df,maxits) %>> df % r...

3 years 前 | 0

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