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Smith Lab

Last seen: 5 months ago |  Active since 2021

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Graduate student in the Department of Chemistry at the University of Georgia.

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Can you use islocalmax2 for a nxnxn grid where the values of that grid correspond to peaks in data density?
I am trying to pickout peaks of data density. I fit my data to a kernel density estimation using the mvksdensity function. I t...

7 months ago | 1 answer | 0

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answer

Answered
How to find peaks in 3d mesh?
Matlab 2024a has a new function islocalmax2 that can find peaks for 3D surface. https://www.mathworks.com/help/matlab/ref/is...

7 months ago | 0

Question


Finding intermediate points between two cartesian coordinates in 3D
I have two data points p1 and p2 with coordinates (x,y,z). How would I find all the intermediate points between them? In 2-dim...

7 months ago | 1 answer | 0

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Question


Vectorize averaging a timerange in a large timetable
I have a timetable of data and a counter of sample times. When there is a non NaN "sample_times" variable, I want to average t...

1 year ago | 1 answer | 0

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Question


Skipping time windows in outlier test
I have a large dataset of 1second time-series data in a timetable. In the dataset I also have a binary flag for when there is a ...

1 year ago | 0 answers | 0

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answers

Question


Retime function creates new rowtimes going back to 1899
I have a timetable of data that I am trying to average to two minutes. When I use: CO2_TT = retime(CO2_TT,'regular','mean','Tim...

1 year ago | 1 answer | 0

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answer

Answered
Average sections of a timetable
Use 'IncludedEdge','right'

1 year ago | 0

| accepted

Question


Average sections of a timetable
I have a data timetable. One of the variables is a flag that determines sample time and background time. For the purposes of my ...

1 year ago | 1 answer | 0

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Question


Get duration of timerange
I have a timetable. I also have a timerange corresponding to data in that timetable. I am having a hard time thinking of how to ...

1 year ago | 1 answer | 0

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answer

Question


Why will categorical not convert this cell string?
What is the difference between these two lines? The first line works correctly. The second line is giving an error. Caused by...

2 years ago | 1 answer | 0

1

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Question


use boxplot to show distribution of values for a range of response variables
I have a timetable where the first column is the response and the rest are variables that I'm using as predictiors. I would lik...

2 years ago | 1 answer | 0

1

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Question


Better work through indecies in a for loop
I use a for loop to compute the absorption of aerosol particles in time series data. I indicate the start and stop of sample tim...

2 years ago | 1 answer | 0

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Question


datetime reading out NaT for all rows of structure except last in loop
I am trying to get durations of a reoccurring event in a timetable by taking the datestring of a file and removing a duration fr...

2 years ago | 0 answers | 0

0

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Answered
Movavg function doesn't compute values for the entire timeseries
The issue is coming from NaN values in the timetable. I treat the data before I smooth it with a filter for erroneous points and...

2 years ago | 0

Question


Movavg function doesn't compute values for the entire timeseries
I use the movavg function twice to do a double exponential smoothing on timeseries data, and for some reasong it's only computin...

2 years ago | 2 answers | 0

2

answers

Question


convert 12 hour data to 24 hour datetime data for timetable
I have a data table with the first 3 variables corresponding to the date/time. I would like to convert the date time variables t...

2 years ago | 3 answers | 0

3

answers

Answered
Call the most recent timetable value
So, I answered my own question. But, maybe someone has a better solution! I take the difference between the times of the measur...

3 years ago | 0

| accepted

Question


Call the most recent timetable value
I have 2 timetables. In order to make a calculation on the data in the first table, I need to call the most recent values of the...

3 years ago | 1 answer | 0

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Question


Subtract I0 from subsequent timetable values
I have a timetable with different variables corresponding to measurements made with an instrument. One of the variables is a log...

4 years ago | 1 answer | 0

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