# Karim

Mechanical Engineer

**Programming Languages:**

MATLAB

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English

**Professional Interests:**

Optimization, Multibody Modeling, Finite Element Analysis (FEA)

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**Content Feed**

Match numbers to allocate text

you can use the categorical command to do this: y = [12 13 19 24 21 12 12]'; B = categorical( y, [12 13 19 21], ["A" "B" "C"...

ongeveer 4 uur ago | 0

How to build a 3d map from raw data?

If you want to plot the curves in 3D, you can use the plot3 command. See below for an example: % read the data opts = spreadsh...

ongeveer 8 uur ago | 0

change the scale of colorbar

you can use the caxis command, simply add caxis( [0 0.02]) below the colorbar command. figure surf(rand(10,10)) c = colorbar;...

ongeveer 8 uur ago | 0

What is the syntax for iterating over given coordinates, using a For loop?

You can do this in the following way: X1 = [10 12 14 23 24 23 18 16 12 10]; Y1 = [20 20 18 15 8 7 8 6 12 20]; for i = 1:num...

6 dagen ago | 0

| accepted

How to convert strings in a table to numbers?

An easy method would be to use the third output of the unique command. This will work directly on strings and will give the core...

6 dagen ago | 1

Extract value from every struct

You can acces the data in the struct by placing a point after the variable name of the struct, follewed by the fieldname you wan...

6 dagen ago | 0

text file to be in the folder

No need for the save command, first create the folder (or check that it exists) and then you can write the file directly into th...

25 dagen ago | 0

How to create a triangular shape using following Code in MATLAB

Based on the scatter mentioned in you question I combined the two loops and the resulting points in a single grid. This allows t...

26 dagen ago | 0

Running my code in a loop to make it more efficient

You can create a for loop, and just save the variables directly into matrices, see below for an example with 10 iterations and 7...

27 dagen ago | 0

| accepted

Count impulses into sequence of impulses and segments of sequences of impulses from signal

If the rectangles were drawn using matlab, then you know the start and stop time. Thus, if this works for the total number of p...

27 dagen ago | 0

Rewrite the format of a string

In the for loop, 'x' starts from 1, hence you will overwrite the data in iwant for each new file. One method to resolve this is...

27 dagen ago | 0

how to draw Bipartite Matrices and Projection Matrices.

such figures can be generated with the spy command. See below for an attempt to produce the top left figure using a bit of rando...

28 dagen ago | 0

| accepted

Array indices must be positive integers or logical values.

The following part of you code can produce an error: i starts at 1, hence you are trying to acces t(0) which is not possible. In...

29 dagen ago | 1

Average of multiple matrices

This depends how your images are stored in memory, if they are stored in a 3D array you can use the mean function % generate 3...

ongeveer een maand ago | 0

| accepted

Vector question help?

% this step creates a vector with 25 normal distributed random values MyVector = randn( 1,25 ) % if you want to round these va...

ongeveer een maand ago | 0

Plot an equation in time span T=[0,t]

You need to create a vector, below you can see a method using the "linspace" function. This creates a vector between 0 and t wit...

ongeveer een maand ago | 0

| accepted

how to create random vector?

RandomDouble = rand(25,1) % i.e. pick 25 random values between 0 and 1 RandomIntegers = randi(1000,25,1) % i.e. pick 25 integer...

ongeveer een maand ago | 0

| accepted

If else -statement doesn't work

The easiest method will be to first create a zero array, and then fill in the values according to the required logic: % intiali...

ongeveer een maand ago | 1

calculate the volume obtained by rotating a function around the X-axis

Hello, since at first glance there are no internal voids you can use the convex hull function to determine the volume numericall...

ongeveer een maand ago | 1

| accepted

To concatenate single column of a cell array

You can use cell2mat to do this, see below for an example % generate cell array with random data C = cell( 3072 , 2); C = cel...

ongeveer een maand ago | 0

| accepted

How to use Matlab to solve equation like Mathcad

Use the symboic toolbox to determine the equations, see below. syms fp1 fp2 fz1 fz2 fc boost real eqn = boost == ( atan(fc/fz1...

ongeveer een maand ago | 0

| accepted

Error in writing the output to excel file

As indicated in the error message you need to convert the sym into a double or a string, see below for both options syms m1 m2 ...

ongeveer een maand ago | 0

| accepted

Trying to find the corresponding value of a matrix with an input?

see below for the interpolation fig = openfig('VelocityAgainstRodHeight500Hz.fig'); axObjs = fig.Children; dataObjs = axObjs....

ongeveer een maand ago | 1

| accepted

How introduce a delay of one second in MATLAB?

you can use the "pause" function, this will pause matlab for the given amount of time pause(1)

ongeveer een maand ago | 0

| accepted

create a sparse multidimensional matrix

you can either fill it in directly or use blkdiag to create this shape: % direct method % on row 3 7 and 11, column 1 2 3 resp...

ongeveer een maand ago | 0

How to define if a point is inside or outside a 3D pyramidal area?

Hi, asuming you want to use as many standard matlab functions, the easiest method i can think is by constructing two terahedrond...

ongeveer een maand ago | 1

How can I create a quadratic matrix with variables?

you do not need to use .' in this case, only use the transpose operator: syms q1dot q2dot q3dot q4dot q5dot real qdot= [q1dot...

ongeveer een maand ago | 0

Frequency words for each labels

Edit to make so that the code works with the latter added example data... % read the file data = readtable("dati_classificat...

ongeveer een maand ago | 1

| accepted

Order Matlab not to continue until the external run is completed

Asuming you are using windows. You can can just add the [~,~] as output to the system command, this way matlab will wait unti...

ongeveer een maand ago | 0

I want to Access value by using its key , the login should to be like if user enter key1 it should match with key1 keyword from excel sheet and give value_1 as output.

Hi, you can compare the strings of the key with the user input, and then use that index to retrieve the value: UserInput = "key...

ongeveer een maand ago | 0