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# Pawel Jastrzebski

### Mahle Engine Systems Ltd

Last seen: plus de 3 ans il y a Actif depuis 2017

Project Leader at Product Testing department.

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

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How to properly apply cellfun in this case - text spliting

plus de 5 ans il y a | 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 ...

plus de 5 ans il y a | 3 réponses | 0

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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>>

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

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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...

plus de 5 ans il y a | 2 réponses | 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.

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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...

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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...

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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....

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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'); % ...

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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...

plus de 5 ans il y a | 2

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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...

presque 6 ans il y a | 0

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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...

presque 6 ans il y a | 0

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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...

presque 6 ans il y a | 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...

presque 6 ans il y a | 1

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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> ...

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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 ...

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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...

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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 ...

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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(...

presque 6 ans il y a | 0

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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...

presque 6 ans il y a | 0

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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...

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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...

presque 6 ans il y a | 1

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2D color or surface plot based on 3 vectors of data

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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...

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how compute the pixel sum for image?

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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); ...

environ 6 ans il y a | 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...

environ 6 ans il y a | 0

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

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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 ...

environ 6 ans il y a | 0