# Diaa

### ASU

Last seen: 24 days ago Active since 2014

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How to create two paths parallel to a non-uniform curve on its both sides?
Suppose I have a path y that can be defined in different ways x1 = 1:0.1:20; y1 = [3*x1(1:20) + 6, ... 5*x1(21:100) - 9...

12 months ago | 1 answer | 0

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Question

MATLAB can't symbolically solve a definite integration
The following definite integration couldn't be symbolically solved by MATLAB. Is there a way to make it solvable by MATLAB? The...

1 year ago | 1 answer | 0

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Question

Understanding how testCase.addTeardown works with @path
The following code is adopted from this blog post: classdef GoodFixturesTest < matlab.unittest.TestCase methods(Test...

2 years ago | 1 answer | 0

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How to robustly set class object properties in the class constructor when using name-value approach without handling them one-by-one?
For the following, is there any robust way to set the class object properties at once by copying each input struct field value t...

2 years ago | 1 answer | 0

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Examples of efficient and inefficient parallel computations on GPU
I am considering buying a new laptop, so I would like to know examples of efficient and inefficient usages of parallel computing...

2 years ago | 0 answers | 0

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Answered
Matlab Live Scripts displaying figures in seemingly random order when multiple code blocks with subplots are used
As a workaround, you can use this MATLAB mechanism in your favor by creating a duplicate dummy figure then delete it to show the...

2 years ago | 0

Question

Find the normal vector at a specific point on a 3D surface defined by an equation
Consider the following code: rng('default') [Xs,Ys,Zs] = sphere; X = (0.99+0.01*rand(size(Xs))).*Xs; Y = (0.99+0.01*rand...

3 years ago | 0 answers | 0

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Find an index of a cell whose element satisfies a condition
Is there a way to economically fix the code below to make it work so that it returns the index of the cell element whose array h...

3 years ago | 2 answers | 0

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How to show the Unit parameter in the signal attrbutes of a constant block?
For the attached Simulink model I created using MATLAB R2021a, how can I show the Unit parameter in the block parameters of the ...

3 years ago | 1 answer | 0

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To change Current Folder to the folder of .m File
For live scripts, @Qi Wang suggested using this: fileparts(matlab.desktop.editor.getActiveFilename) to get the full path of t...

3 years ago | 4

Answered
ode45 goes busy endlessly when using the sign of a state variable
Thanks to the explanation of Star Strider, the use of sign() can be replaced by fr*Mass*9.8)*(y(2)>0) to make it work.

3 years ago | 0

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Question

ode45 goes busy endlessly when using the sign of a state variable
This term "- fr*Mass*9.8*sign(y(2))" makes ode45 busy forever specifically when using 'sign(y(2))' I just need to make -fr*Mass...

3 years ago | 2 answers | 0

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Changing the same property of some axis children using subsasgn
How to make the following code work in order to change the 'Visible' property of some children plots whose handles are stored in...

3 years ago | 1 answer | 0

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Answered
How to write code in MATLAB?
Your code in the question is not clear to me, nevertheless, my code below can be edited to fulfil your needs. x = 1:10; % array...

3 years ago | 0

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Working a definite integral
Read this Definite Integrals of Symbolic Expressions, then you can do syms x vpaintegral(1/sqrt(1-x^2)*(x^2+1.1202*x+0.2132),[...

3 years ago | 1

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Question

How to solve a set of symbolic equations for the same variable?
Is there a way to make the following work and solve the following set of symbolic equations for the same variable and save the o...

3 years ago | 1 answer | 0

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MeshDensity: How to exactly set the number of evaluation points of fplot?
In the documentation, it is said under 'MeshDensity' option of 'fplot': "Number of evaluation points, specified as a number. T...

3 years ago | 1 answer | 0

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Question

'deal' doesn't distribute the elements of a calculated array out of cellfun
For the following syms syma symb eqns = [... syma*exp(symb)== 1,... syma*exp(symb*1500) == 5,... ]; vars = [s...

3 years ago | 1 answer | 0

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How do I skip items in a legend?
You can simply delete the last undesired entry by the following: % assume you plotted some curves before this line and all of t...

3 years ago | 1

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autorename if saved file already exist
Revisitng this old question, I followed the idea of Jan to come up with this solution of appending the existent file name with a...

4 years ago | 1

Question

Is it possible to have an inline function inside a cell array to conditionally return an element to be stored?
Consider I have mycondition = true; truestatement = 'yes'; % returned by the inline function when mycondition is true falsest...

4 years ago | 2 answers | 0

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How to selectively save the names and values of some workspace variables to a CSV file?
Thanks to the inspiring answer of @Rik, I found the following solution without the need to use for loop a = 3; b=7; c=5; d=9; ...

4 years ago | 0

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How to selectively save the names and values of some workspace variables to a CSV file?
Consider the following a = 3; b=7; c=5; d=9; save('test.mat') data = load('test.mat'); toSave = { 'b' ; 'c' }; writece...

4 years ago | 2 answers | 0

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Write to an already opened Excel file
The following MATLAB code works well for writing eActiveSheetRange.Value to the range eActiveSheetRange However, I have t...

4 years ago | 1 answer | 0

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Question

Live scripts stored in MATLAB Drive are assumed to be located in Temp folder
I have MATLAB R2019a on Win10 and MATLAB Drive Connector. Some live scripts are stored in the local MATLAB Drive folder. Howeve...

4 years ago | 1 answer | 0

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Question

Reshaping Nodal Spatial Vectors into 3D Matrices for Countourslice
I have a problem of temperature field across a cubic domain. My nodes locations are stored in 3 column vectors of *x=[x1 x2 ....

9 years ago | 0 answers | 0

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