Peter Perkins
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Content Feed
Coverting Timetable to Column Vector
Sam, it looks like you are ending up with a 7201x6 timetable whose variables are cell arrays, and each cell contains a 500x1 dou...
5 días hace | 1
| aceptada
A very fast way to sort datetime (in "ascend" mode)?
It seems like the obvious response to Any way faster than this one ? [~, idx2] = sort(datenum(a), 1, 'ascend'); is to...
16 días hace | 1
Average of variables in timetable belonging to the same day over several years
Ziad, it seems that "dayofyear" is using "serial day number of year", and as you found, is lumping 29-Feb's with the non-leap 1-...
3 meses hace | 0
| aceptada
Compile data from excel sheets into a dataset with multiple tags
Charlie, I'm confused. I haven't followed all of what you code does, but it seems that you are lining up tables of different he...
3 meses hace | 0
Only required the mean value out rather then every single value in a data
"7" sounds rather suspiciously like "weeks". If this were a timetable, it would be a one-liner with groupsummary. Moral: don't t...
5 meses hace | 1
Using date and time in MATLAB
I'm having trouble following exactly what needs to be done, but I imagine you want to append variables to your LoadProfile&Tarif...
6 meses hace | 1
| aceptada
Help Merge two tables by the column variables
See join (or maybe innerjoin).
6 meses hace | 1
| aceptada
generate an independent seed with a fixed number
Ebru, you are doing parallel simulations and presumably want to combine the results under the assumption that those results are ...
6 meses hace | 3
| aceptada
Export rows as combined separate CSV files
There are a bunch of ways to do this. I thought I'd see how well rowfun works: > C = {rand(10,1) rand(10,1); rand(10,1) rand(10...
6 meses hace | 0
Error: Row index exceeds table dimensions.
SOLARL.Date2 = datenum(SOLARL.Date); DON'T do that. Just use datetime. You can call unique, length, and == a on datetime vector...
6 meses hace | 0
Elementwise calculations when making a new Table column
Will noone think of the joins? "I am trying to find (value1-min)/(max-min) using the appropriate max and min for the protocol ...
6 meses hace | 0
unstack table with pre and post measurements
unstack needs you to tell it three things: 1) which variables to unstack. It looks like you want SystemWeight, JumpHeight, ... ...
6 meses hace | 0
How to grab the first instance of a timestamp based on the second
It's a one-liner using a timetable and retime, with NewTimeStep 'secondly' and Method 'firstValue': >> tt = timetable(rand(10,1...
6 meses hace | 0
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how can I calculate movmean from 1 periode wave data?
In addition to what Mathieu suggests, there are similar things shown in these examples, especially the first one: https://www.m...
6 meses hace | 0
How to compare 2 columns line by line between two matrix of different size?
ismember will work, but ithis is a join operation. It's a one-liner: >> matrix1 = readtable('datasetPDP.csv'); >> matrix2 = re...
6 meses hace | 0
| aceptada
averaging columns in a table based on two other columns
This should be straight-forward using either groupsummary, or varfun with displacement_pixel as the input/data variable and x_pi...
6 meses hace | 0
How do I make an array from select points in a large table (based on dates)?
Alex, you already have a timetable, which is the right thing to use. To help get you started: >> i = isbetween(timeofday(UMR202...
6 meses hace | 0
| aceptada
How to reformat this table's information so that a column of data becomes the header's for matching data?
I guess this is a useful format? Voss shows one way, here's another: >> Items = "Item" + (1:8)'; >> Family = "Family" + [1;2;4...
6 meses hace | 1
Import and export excel data having combined number and text in a single cell.
If each cell of your spreadsheet literally contains things like "4-sample1-sample2-(23.56,-13.54)", then you may want to figure ...
6 meses hace | 0
Stacked plots: display two variables on the same x-axis
Farbod, IIUC, you cannot do that with stackedplot. Each subplot can have only one y axis. The whole point of stackedplot is to a...
6 meses hace | 0
retrieve data specific date
In addition to what KSSV shows, since you say "retrieve data", I recommend that you use a timetable, and things like timerange,o...
6 meses hace | 0
Outerjoin does not merge the keys
As Kevin implies, your are using all four variables in smalltable as keys. That makes no sense. On top of that, there are NO com...
6 meses hace | 0
Combination of two signals with different sample rates
Use a timetable, and call synchronize. synchronize uses interp1, but it may be that you particularly want to use the SP-oriented...
6 meses hace | 0
Problem in determining standard error and plotting 3 error bars
Zhou, independently from how to make the figure, this code Data = table2array(WORK01S1); % convert it into array Temp = ...
6 meses hace | 1
Select best time in an array
You are making your life more difficult using fopen etc. Use writetable and readtable: >> laptimes = readtable("laptimes.txt","...
6 meses hace | 1
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tic/toc versus time.perf_counter_ns()
The doc doesn't say you can't use tic/toc to time very short things, and clearly that is not true: >> tic, x = 1; toc Elapsed ...
6 meses hace | 0
How to extract time series averaged over a region?
Keegan, there's a bunch of ways to do this, here's one that uses a timetable: >> lat = ncread("chl2020.nc","latitude"); >> lon...
7 meses hace | 0
| aceptada
How can I merge successive row values (sum of the values) of the column Y according to a condition in column X?
You want to do grouped sums, where the groups are defined by consecutive zeros in X. Once you have the groups defined as a new v...
7 meses hace | 0
Stackedplot: Incorrect x-axis values & multi-variable usage
Jackson, you have a table, and while stackedplot knows to plot against time with a timetable, it can't know what to plot against...
9 meses hace | 0
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How to do interpolation only if data interval is > than 3h?
StarStrider's suggestion of datetime and retime is the way to go. Also, like SS, I am mostly guessing at what you are asking for...
9 meses hace | 0
| aceptada
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