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How to reference previous value in an array without a for loop?
use i=2:size(data,1); data.Var3(i)=interp1(ref_data.x,ref_data.y,data.Var2(i))-interp1(ref_data.x,ref_data.y,data.Var2(i-1...
How to reference previous value in an array without a for loop?
use i=2:size(data,1); data.Var3(i)=interp1(ref_data.x,ref_data.y,data.Var2(i))-interp1(ref_data.x,ref_data.y,data.Var2(i-1...
3年以上 前 | 1
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how to find the find the different rows in 2 matrices based on 2 conditions?
% I just try my best to catch your idea by looking at your words, my engish % is not so good but I want to help you with this p...
how to find the find the different rows in 2 matrices based on 2 conditions?
% I just try my best to catch your idea by looking at your words, my engish % is not so good but I want to help you with this p...
3年以上 前 | 0
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How to sort a 3D matrix according to the value of each element?
I think you want make something gif to show how the numbers are sorted? % sort show % show bubbling clc;clear % load('Number...
How to sort a 3D matrix according to the value of each element?
I think you want make something gif to show how the numbers are sorted? % sort show % show bubbling clc;clear % load('Number...
3年以上 前 | 0
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How to display the output as table shown below?
You can use a table to achieve the output Node = reshape(permute(z,[1,3,2]),numel(z)/size(z,2), size(z,2)); Nodenumber = char ...
How to display the output as table shown below?
You can use a table to achieve the output Node = reshape(permute(z,[1,3,2]),numel(z)/size(z,2), size(z,2)); Nodenumber = char ...
3年以上 前 | 0
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Read in numbers as text from excel
IF in excel, a number with high precision is not stored with text format, it cannot be read by readcell with string format for h...
Read in numbers as text from excel
IF in excel, a number with high precision is not stored with text format, it cannot be read by readcell with string format for h...
3年以上 前 | 0
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Plotting 4D function
In the finite element analysis, you have the coordinates of nodes and elements for node order. Also, to each node, the attached ...
Plotting 4D function
In the finite element analysis, you have the coordinates of nodes and elements for node order. Also, to each node, the attached ...
3年以上 前 | 0
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High dimension matrix summation: a + b != b + a
It is a problem of machine error. If you have learned numerical analysis lessons, you will notice that big number will 'eat' sma...
High dimension matrix summation: a + b != b + a
It is a problem of machine error. If you have learned numerical analysis lessons, you will notice that big number will 'eat' sma...
3年以上 前 | 0
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how to process the data in a file and repeat the procedure for different folders?
Here is an example for reading files and changing its content q = 0.1:0.1:2; folder = arrayfun(@(i)['surface\',num2str(q(i)),'...
how to process the data in a file and repeat the procedure for different folders?
Here is an example for reading files and changing its content q = 0.1:0.1:2; folder = arrayfun(@(i)['surface\',num2str(q(i)),'...
3年以上 前 | 0
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About the use of find
Find is not at all faster than logical inices. IF you know how to use logical indices to get elements from matrix. I believe yo...
About the use of find
Find is not at all faster than logical inices. IF you know how to use logical indices to get elements from matrix. I believe yo...
3年以上 前 | 0
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Finding certain numbers in vectors
any(ismember(v1, nmbr)) any(ismember(v2, nmbr)) any(ismember(v3, nmbr)) If true, then the vector has any of these numbers [2 ...
Finding certain numbers in vectors
any(ismember(v1, nmbr)) any(ismember(v2, nmbr)) any(ismember(v3, nmbr)) If true, then the vector has any of these numbers [2 ...
3年以上 前 | 0
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Hello all! I have some ambiguity with MATLAB. I saved my matrix as A(:,:,1) in workspace. Now I want to access column or some entries of my big matrix on command window.
Do by following code for i=1:4 A(:,:,i)=i*ones(4,4); end B = permute(A,[3,2,1]); B(:,:,2) The result is ans = ...
Hello all! I have some ambiguity with MATLAB. I saved my matrix as A(:,:,1) in workspace. Now I want to access column or some entries of my big matrix on command window.
Do by following code for i=1:4 A(:,:,i)=i*ones(4,4); end B = permute(A,[3,2,1]); B(:,:,2) The result is ans = ...
3年以上 前 | 0
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Specify nature/type of property
First define the food class Then define meals class Now run meals in the command window, we get empty class meals with two...
Specify nature/type of property
First define the food class Then define meals class Now run meals in the command window, we get empty class meals with two...
3年以上 前 | 0
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How to solve hyperbolic function ratio equation
you can solve it with symbolic expression syms z x y eq = y/z - tanh(x)/tanh(x/2); sol = solve(eq, x, 'ReturnConditions',true...
How to solve hyperbolic function ratio equation
you can solve it with symbolic expression syms z x y eq = y/z - tanh(x)/tanh(x/2); sol = solve(eq, x, 'ReturnConditions',true...
3年以上 前 | 0
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Remove contour line from unwanted region
%%Example from other user x = -100:100; y = -100:100; inputData = rand(201); inputData(abs(x)<=10,abs(y)<=10) = nan; contou...
Remove contour line from unwanted region
%%Example from other user x = -100:100; y = -100:100; inputData = rand(201); inputData(abs(x)<=10,abs(y)<=10) = nan; contou...
3年以上 前 | 0
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i want to detecting bubble in the image and measuring the size
Use DCT transformation and with a critical bw value I=double(imread ('image.bmp')); I = -(I-min(I(:)))/(min(I(:))-max(I(:))); ...
i want to detecting bubble in the image and measuring the size
Use DCT transformation and with a critical bw value I=double(imread ('image.bmp')); I = -(I-min(I(:)))/(min(I(:))-max(I(:))); ...
3年以上 前 | 0
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How to make a new table from two different table with common value?
result has the same row number as T1 or T2? result = table(C,'variablenames',{'datetime'}); result.value1 = T1.value(1:(size(r...
How to make a new table from two different table with common value?
result has the same row number as T1 or T2? result = table(C,'variablenames',{'datetime'}); result.value1 = T1.value(1:(size(r...
3年以上 前 | 0
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How to export FEMesh?
The mesh is now the field of model you can get mesh by Mesh = model.Mesh; % nodes are obtained by Nodes = Mesh.Nodes; % d-b...
How to export FEMesh?
The mesh is now the field of model you can get mesh by Mesh = model.Mesh; % nodes are obtained by Nodes = Mesh.Nodes; % d-b...
3年以上 前 | 0
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In solving ordinary differential equations of elasticity, I got the following hint“Unable to find symbolic solution”.How should I modify the solution
That means matlab can not find symbolic solution for the ode with the given boundary condintions (Given values at two ends). Ta...
In solving ordinary differential equations of elasticity, I got the following hint“Unable to find symbolic solution”.How should I modify the solution
That means matlab can not find symbolic solution for the ode with the given boundary condintions (Given values at two ends). Ta...
3年以上 前 | 0
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Strings to variable names
Hi, try following code results{:,'X'} = results{:,'Sigma'}; results(:,'Sigma') = []; results{:,'Y'} = results{:,'LR'}; resul...
Strings to variable names
Hi, try following code results{:,'X'} = results{:,'Sigma'}; results(:,'Sigma') = []; results{:,'Y'} = results{:,'LR'}; resul...
3年以上 前 | 0
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Euler's method
Hi, Use y(i+1)=y(i)+ h*(((sin(2*x(i)))/x(i)^2)-(2*y(i)/x(i))); instead of y(i+1)=y(i)+ h*(((sin(2*x))/x^2)-(2*y/x));
Euler's method
Hi, Use y(i+1)=y(i)+ h*(((sin(2*x(i)))/x(i)^2)-(2*y(i)/x(i))); instead of y(i+1)=y(i)+ h*(((sin(2*x))/x^2)-(2*y/x));
3年以上 前 | 0
送信済み
Rotate 3d object by local coordinate axis of two vectors
This function is for rotating an object by two perpendicular vectors. I rotate the x-axis to e1 vector direction and y-axis to e...
3年以上 前 | ダウンロード 1 件 |
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Please help me. I really need help with copula.
use corrcoef is ok, returns the matrix of correlation coefficients for A, where the columns of A represent random variables an...
Please help me. I really need help with copula.
use corrcoef is ok, returns the matrix of correlation coefficients for A, where the columns of A represent random variables an...
3年以上 前 | 0
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how to loop a equation.
Why use symbol? R=8.314; T=[600:50:800]; D=0.27*(1.04/-0.22)*exp((-246)./(R*T)) The D array is good to use D = -1.2149...
how to loop a equation.
Why use symbol? R=8.314; T=[600:50:800]; D=0.27*(1.04/-0.22)*exp((-246)./(R*T)) The D array is good to use D = -1.2149...
3年以上 前 | 0
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Rotation of Ellipse to a specific vector
By following operator you will get what you want clc;clear blueLine = [-0.4, 0.8, 0]; % direction of blue line xc = 1; yc =...
Rotation of Ellipse to a specific vector
By following operator you will get what you want clc;clear blueLine = [-0.4, 0.8, 0]; % direction of blue line xc = 1; yc =...
3年以上 前 | 0
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Euler's Method
Euler forward? clc;clear odefun = @(x,y) x^(-2) *(sin(2*x)-2*x*y); % I have rewritten the ode function xspan = [1,2]; x0 = x...
Euler's Method
Euler forward? clc;clear odefun = @(x,y) x^(-2) *(sin(2*x)-2*x*y); % I have rewritten the ode function xspan = [1,2]; x0 = x...
3年以上 前 | 0
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Graph in tiff format : how to interchange X and Y axis ?
I usually use GetData software. while with matlab, I wrote code for this problem below % Extract data from image clc;clear fi...
Graph in tiff format : how to interchange X and Y axis ?
I usually use GetData software. while with matlab, I wrote code for this problem below % Extract data from image clc;clear fi...
3年以上 前 | 0
質問
How to become a staff if you are among the big potatos of mathworks in the answer community?
3年以上 前 | 2 件の回答 | 0
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linear interpolation in 3D space
Using point2segmentDistance function function [distance, nearestPointOnSeg ]= point2segmentDistance(point, segmentPoint1, segme...
linear interpolation in 3D space
Using point2segmentDistance function function [distance, nearestPointOnSeg ]= point2segmentDistance(point, segmentPoint1, segme...
3年以上 前 | 1
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Construct the statement on MATLAB: If a person has more than 10 apples then he will sell 8. But if he has less than 10 apples than he will sell 5 apples
apples_left = 20; % total apples at the beginning while true if(apples_left<5) break; end if(apples_left>10...
Construct the statement on MATLAB: If a person has more than 10 apples then he will sell 8. But if he has less than 10 apples than he will sell 5 apples
apples_left = 20; % total apples at the beginning while true if(apples_left<5) break; end if(apples_left>10...
3年以上 前 | 0
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How do I calculate acceleration when I have instantaneous values of velocity?
Use pddiff function attached here, this is easy to use. t = linspace(0,3*pi,19)'; f = sin(t); % assume this is the velocity [...
How do I calculate acceleration when I have instantaneous values of velocity?
Use pddiff function attached here, this is easy to use. t = linspace(0,3*pi,19)'; f = sin(t); % assume this is the velocity [...
3年以上 前 | 0
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