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DuckDuck


university of Life

Last seen: mer än 4 år ago |  Active since 2012

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How do i count same consecutive occurrences
Consider I have an array of occurrences A=[1,1,1,1,1,2,2,2,2,3,3,3,3,2,2,2,1,1,1,1] I want to find out how many 2 ar...

ungefär 6 år ago | 3 answers | 1

3

answers

Question


Select the same number of samples from each class.
Say I have a table with 2 columns, one column stores the value the other the class of the value. The classes are imbalanced. I w...

mer än 6 år ago | 1 answer | 0

1

answer

Question


Read a nested json file.
I have a nested json file with lines of this type: {"results":{"whatever_name":{"id":77},"another_name":{"id":89},"another_...

mer än 6 år ago | 1 answer | 0

1

answer

Question


how to concatenate tables stored in a structure
I have a structure where tables with same variable names are stored. I want to concatenate all these tables in one big table. ...

mer än 6 år ago | 3 answers | 0

3

answers

Question


nearestNeighbour Undefined function or variable 'nearestNeighbor'
I want to use this method nearestNeighbour but Mathlab cannot find it. i can complete the name of the method by hitting tab whe...

ungefär 8 år ago | 1 answer | 0

1

answer

Question


How to plot over a home blueprint?
Hello researchers, I stumbled upon a visualization problem. Let say i want to plot the indoor navigation coordinates over my...

ungefär 8 år ago | 0 answers | 0

0

answers

Question


Interpolating data based on the time segments.
Hello everybody, I have a time series with the average sample 1 second but samples some time delay more or less than that. I...

ungefär 9 år ago | 1 answer | 0

1

answer

Question


How can be a buffered signal reconstructed?
I have a signal which i buffered with 2/3 overlap. Now i want to rebuild the buffered signal, but i don't know how to do it. T...

nästan 10 år ago | 1 answer | 0

1

answer

Question


what is called half width at full height amplitude ratio.
I' doing some signal processing, and noticed that when i find a peak i can use the ratio of peak width at full height and the am...

nästan 10 år ago | 0 answers | 0

0

answers

Question


How to read part of folder
I have my data saved into folders based on time of creation. the structure is like this: folder: 05_dec._2014_08-15-03.33...

nästan 10 år ago | 2 answers | 0

2

answers

Question


Cannot read video Matlab 2014b Linux!
I am trying to read a h264 video in Matlab Ubuntu 14.10 using VideoReader, and i get an error. "Could not read file due to ...

nästan 10 år ago | 2 answers | 0

2

answers

Question


Findpeaks from signal processing toolbox does not work.
I'm stuck into this problem. I need to use the findpeaks from <http://nl.mathworks.com/help/signal/ref/findpeaks.html Signal Pro...

ungefär 10 år ago | 1 answer | 0

1

answer

Question


How to append points to kml file
Hi, i'm trying to append points to a kml file but it seems impossible to do so. do you know a way to do that in a simple way in...

ungefär 10 år ago | 1 answer | 2

1

answer

Question


Iterate through matrix until no more possible calculations.
I have an array that shortens up every time i do an iteration. But how do i know when there are no more possible calculations t...

ungefär 10 år ago | 1 answer | 0

1

answer

Question


how to remove rows from an array containig elements from another array
Suppose i have a matrix of a=[1,2; 1,3; 1,4; 2,12; 2,15; 5,7; 5,8; 6,98; 6...

ungefär 10 år ago | 1 answer | 0

1

answer

Question


How to create an array out of a matrix based on criteria.
Suppose i have a matrix of a=[1,2; 1,3; 1,4; 2,12; 2,15; 5,7; 5,8; 6,98; ...

ungefär 10 år ago | 1 answer | 0

1

answer

Question


Clustering GPS points based on distance between points?
Hello everyone! Can some one of you how can i cluster GPS points. Let say i have a ploted on a map some GPS points and i wan...

ungefär 10 år ago | 2 answers | 0

2

answers

Question


Have to spit gps distance into equal segments
I have gps readings with 1Hz sampling also accelerometer readings with 93Hz sampling. using the pos2dist i got the distance bet...

mer än 10 år ago | 0 answers | 0

0

answers

Question


how remove tow of three consecutive same values in a vector
I have two vectors like this a=[1,2,3,1,1,1,2,3,2,3,1,1,1,1,2,3,3,3,2,2,1], where * _b_ * is id of * _a_ * b=[1,2,3...

mer än 10 år ago | 2 answers | 0

2

answers

Question


Cell array, getting the columns that have non empty cells in the middle of the column
Hi every body. I have a cell array m|x|n , this array is created using a buffer function with an overlap. So i have a 1 dimensi...

mer än 11 år ago | 0 answers | 0

0

answers

Question


how to get all the windows inside a time interval
I have framed my data and overlaped, i want to include all the windows that fall into a time interval. right now i can only get ...

mer än 11 år ago | 0 answers | 0

0

answers

Question


Is it possible to get the innside part envelope of the signal
I have a signal with a lot of peaks. what i want to achieve is to get the envelope of inner part of the signal, the one of tha...

mer än 11 år ago | 0 answers | 0

0

answers

Question


how to plot a 2D graph on top of a 3D surf
i have a PSD spectrogram and want to plot on top of that a time series graph. In the link is what i want to achieve:<https://do...

mer än 11 år ago | 1 answer | 0

1

answer

Question


How to plot a time series on top of a spectrogram surf
I'm stacked in this situation when i need to plot smth like this photo:<<https://docs.google.com/file/d/0B61s6H8F7eyNVXFCNFVseFF...

mer än 11 år ago | 0 answers | 0

0

answers

Question


how to extract features from wavelet transform
i have some time series data and extracted features from that, mean, standard deviation, variance, ZCR etc. now i want to get f...

mer än 11 år ago | 1 answer | 0

1

answer

Question


how to get the most repeated element of a cell array?
i have an cell array like this {[];[];[];[];[];[];[];[];'rj';'rj';'rj';'rj';'rj';'rj';'rj';'rj';'rj';'rj';'rj';'rj';'rj';'rj...

mer än 11 år ago | 3 answers | 0

3

answers

Question


showing video and sensor graph simultaneously
Hi! i have some sensor data and also the video footage of that particular action. is there a way in matlab to show the video a...

mer än 11 år ago | 1 answer | 0

1

answer

Question


renaming variable on workspace with string from cell of catalogue
i enter to a promt the name of my variable. that name is stored in a cell of catalogue. I want to use that name to rename my m...

mer än 12 år ago | 1 answer | 0

1

answer

Question


trying to find peaks on a time series
i'm trying to find peaks on some time series data but when i write [pks,locs]=findpeaks(x) i get the position of peak on...

mer än 12 år ago | 2 answers | 0

2

answers

Question


remove frame of timeseries data when criteria is not met.
I have some time series data, and i framed for further proccessing. I need to skip those frames that does not meet pas the thre...

mer än 12 år ago | 0 answers | 0

0

answers

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