Pawel Jastrzebski

Last seen: 5 mesi ago

Mahle Engine Systems Ltd

136 total contributions since 2017

Project Leader at Product Testing department.

Mahle UK R&D Center for automotive engine plain bearings.

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Answered
How to properly apply cellfun in this case - text spliting
<https://uk.mathworks.com/matlabcentral/profile/authors/3073010-rik-wisselink Rik Wisselink>, <https://uk.mathworks.com/matlabce...

oltre 2 anni ago | 0

Question

How to properly apply cellfun in this case - text spliting
I've got a table like this and my task is to separate the parameter name from a value: t = 10×1 table ...

oltre 2 anni ago | 3 answers | 0

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Answered
Error using figure: First argument must be a figure object or a positive Integer
The doc says the input argument must be of double type: <</matlabcentral/answers/uploaded_files/128021/Capture.PNG>>

oltre 2 anni ago | 0

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Answered
How do I plot a multivariate distribution?
Consider the following example: NoOfPoints = 1000; % Generate 'x' and 'y' x = rand(NoOfPoints,1); y ...

oltre 2 anni ago | 0

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Question

How to use 'setvartype' to get the variable as 'datetime' formatted as: yyyy-MM-dd
I've got a spreadsheet which gets imported into Matlab via *readtable()*. Prior to importing I use *detectImportOptions()* an...

oltre 2 anni ago | 2 answers | 0

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How to generate a sine signal in which initially frequency increases linearly, then remains constant for some time and again decreases linearly.
Would it look like this: <</matlabcentral/answers/uploaded_files/126310/untitled.jpg>> % y = sine(2*pi*f*t) t...

oltre 2 anni ago | 0

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Answered
Plotting multiple trajectories on map
This is roughly how I would go about this problem [code untested]: % Get all the file names in the folder filename = dir...

oltre 2 anni ago | 0

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Answered
Why is the correlation matrix much larger than the original matrix?
Have you checked the documentation for the corrcoef function? It explains exactly how the results are obtained: * <https://uk...

oltre 2 anni ago | 1

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Answered
Plotting very small values using bar command
If you have a mix of relatively high and low values, you might want to consider using the logarithmic scale for the y-axis, i.e....

oltre 2 anni ago | 0

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Answered
How to apply function to certain files in directory
Just get the function to work on the selected files in the folder to begin with: i.e. fileNames = dir('*.raw'); % ...

oltre 2 anni ago | 0

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How to remove consecutive duplicates ?
Consider the following example: ConsecDuplic = [1 2 2 3 4 5 5 5 6 7 8 9 9] % Logical vector: % check if next val...

oltre 2 anni ago | 0

Answered
How can I recognize an empty row in the middle of an Excel file?
Consider the following code: % STEP 1: LOAD DATA % load excel file to a table t = readtable('BF1.xlsx'); % thi...

oltre 2 anni ago | 0

Answered
I need to put data from columns in different cells into one vector
Consider the following example: % 1. Create fake data (you'll use the real data) % create empty cell 1x20 c = cel...

oltre 2 anni ago | 0

Answered
I am getting Unbalanced or unexpected parenthesis or bracket?
*Line 1:* get rid of the comma: if PlotVI_Module *Line 15 and 25:* change round brackets to square ones and you had a on...

oltre 2 anni ago | 1

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how to add numbers and labels to scatterplot bubbles?
There's a function called: * <https://uk.mathworks.com/help/matlab/ref/text.html?s_tid=doc_ta Text> that is used for label...

oltre 2 anni ago | 0

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Answered
How do I change axes orientation to a desired one
See documentation for: * <https://uk.mathworks.com/help/matlab/ref/view.html?searchHighlight=view&s_tid=doc_srchtitle view> ...

oltre 2 anni ago | 0

Answered
Cut random 30secs of audio from an audio recording .wav
This code will allow you to import and export all of the audio files in your current folder: % get file names in the ...

oltre 2 anni ago | 0

Answered
How to extract information from the filename?
This will get you the structure of all of the text files in your current folder: x = dir('*.txt') % structure In m...

oltre 2 anni ago | 0

Answered
How to find vectors that are multiple of other vectors inside a matrix
I think this will get you going. This code will help you identify which 'NextRow' is a multiplier of 'previousRow': % DATA ...

circa 3 anni ago | 0

Answered
How do i plot?
Is this what you meant? dt = 0.0001; t = 0:dt:0.02; y = (5+cos(20*pi*t)).*cos(2*pi*100*t); figure; plot(...

circa 3 anni ago | 0

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Answered
How to plot vertical lines for reference using vline?
I've moved my comment to the answer so the question can be closed. I've also tried to copy your example to show you what I think...

circa 3 anni ago | 0

Answered
Covariance calculation like excel formula
Given the code: A = randi([18 22], 20,1) B = randi([15 25], 20,1) C = cov(A,B) This is the outcome that you'll...

circa 3 anni ago | 1

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Answered
How to add an interval to a number?
This example should have the answers to your problems: % Values that can be changed in the code: % d, Xu, Yu % or...

circa 3 anni ago | 1

Answered
2D color or surface plot based on 3 vectors of data
How about this: % interpolation data % as in: % https://uk.mathworks.com/help/matlab/ref/scatteredinterpolant.html?se...

circa 3 anni ago | 0

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Answered
2D color or surface plot based on 3 vectors of data
In order to be able to use contour plot, your Z data need to be of X*Y size. What you can do is the following: % C is a ma...

circa 3 anni ago | 0

Answered
how compute the pixel sum for image?
# Use <https://uk.mathworks.com/help/matlab/ref/imread.html#btnczv9-1-A imread - output> to load the image into Matlab and store...

circa 3 anni ago | 0

Answered
Getting corresponding y values from moving average graph when having x values
Consider the following example: % RANDOM DATA startDate = datetime(2018,01,01); endDate = datetime(2018,04,01); ...

circa 3 anni ago | 1

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To label same X axis twice
You can certainly add minor ticks and show them on the grid but I'm not sure if there's an easy way to label them. In other word...

circa 3 anni ago | 0

Answered
Long-horizon predictive regressions
The R value calculation is available in Matlab: * <https://uk.mathworks.com/help/matlab/ref/corrcoef.html R coefficient> As ...

circa 3 anni ago | 0

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Answered
how to save 120 figures in a folder defined by user and later retrieve it?
When you say 120-off figures: * Are these matlab figures *.fig*? Also, see the code below that was used to create what is ...

circa 3 anni ago | 0