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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...

4 months ago | 0 answers | 0

### 0

answersQuestion

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...

4 months ago | 2 answers | 0

### 2

answersQuestion

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 ...

5 months ago | 1 answer | 0

### 1

answerTo 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...

5 months ago | 0

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.

6 months ago | 0

| accepted

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...

6 months ago | 2 answers | 0

### 2

answersQuestion

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...

6 months ago | 1 answer | 0

### 1

answerHow 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...

8 months ago | 0

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),[...

9 months ago | 1

| accepted

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...

10 months ago | 1 answer | 0

### 1

answerQuestion

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...

10 months ago | 1 answer | 0

### 1

answerQuestion

'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...

11 months ago | 1 answer | 0

### 1

answerHow 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...

11 months ago | 1

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...

1 year 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...

1 year ago | 2 answers | 0

### 2

answersHow 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; ...

1 year ago | 0

Question

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...

1 year ago | 2 answers | 0

### 2

answersQuestion

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...

1 year ago | 1 answer | 0

### 1

answerQuestion

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...

2 years ago | 1 answer | 0

### 1

answerQuestion

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 ....

7 years ago | 0 answers | 0