Community Profile

photo

Eric Sofen

Last seen: 5 Tage vor Aktiv seit 2018

Statistics

  • Knowledgeable Level 4
  • 3 Month Streak
  • Revival Level 1
  • First Answer

Abzeichen anzeigen

Content Feed

Anzeigen nach

Beantwortet
Problems trying to find fakes dates.
The reason datetime(2005,2,29) works is that we want to support constructing a vector of datetimes: datetime(2023,1,1:100) Not...

13 Tage vor | 0

Beantwortet
Case insensitivity for keys in outerjoin and ismember?
We've had a variety of requests for a "lenient" join, but there's also a variety of different interpretations of "lenient." :-) ...

etwa ein Monat vor | 1

| akzeptiert

Beantwortet
How I can create a while cycle that ends after a sepecific time
I think timer is likely to give you better precision for this sort of thing than tic/toc (tic/toc is better for timing performan...

etwa ein Monat vor | 0

Beantwortet
convert cell array into date and time string
As much as I love string, there's no need to do an extra type conversion. Just concatenate the elements of the cell into a char ...

etwa ein Monat vor | 0

Beantwortet
Break array or timetable into smaller versions and find max value
Normally, groupsummary or varfun should be the starting point for grouped calculations like this, but your particuar problem is ...

etwa ein Monat vor | 1

Beantwortet
result in table format or excel format
It's a little circuitous, but you can use writelines to write the char vector to a text file, then use the power of readtable to...

etwa ein Monat vor | 1

Beantwortet
Merge tables with different columns and for matching columns update missing values in left table with values from right table
This is a tricky combination, and not doable in a single join right now. As you say, the outerjoin of A and C to create a table ...

etwa ein Monat vor | 0

Beantwortet
How to extract all the data between two different dates?
I'd recommend using a timerange. Isbetween returns a logical vector based on a vector of datetimes. This can then be used to in...

etwa ein Monat vor | 1

Beantwortet
How can I isolate and subplot June from the whole year?
Using datenum is no longer recommended. I'd encourage you to use datetime for date and time calculations in MATLAB. Among other ...

etwa 2 Monate vor | 0

Beantwortet
Creating Simulink dataset with timetable for importing in simulink signal editor
We're aware of this issue and have been working to reconcile it. The time vectors in Simulink and timetable are constructed in b...

3 Monate vor | 0

Beantwortet
Read netCDFs in loop and export to table with different sizes
I would suggest using timetable and the synchronize method. I assume nlevel is the sensor data? If so, build up a cell array of...

5 Monate vor | 0

| akzeptiert

Beantwortet
divide year time data into days and nights
Steve beat me to it, but here's another solution that uses the datetime isbetween function. SunriseSunset = table((1:365)',date...

5 Monate vor | 0

| akzeptiert

Beantwortet
Add code to have switch repeat if a case is not met
A while loop is one way to accomplish this. Also note that you can use lower() to reduce the number of cases. max_number = na...

5 Monate vor | 0

Beantwortet
Adding time to time string
Here's another slightly different approach. There's no need to replace "/" with "-" for datetime to parse it. Duration can parse...

7 Monate vor | 0

Beantwortet
Convert DoY and hour to datetime format
The datetime constructor is forgiving about day values that don't fit within a particular month and wrapping them appropriately:...

7 Monate vor | 0

Beantwortet
Compare table variables with input list and replace missing vars with NA
Readtable and outerjoin do the trick (xlsread is discouraged at this point - readtable is preferred). FYI, there's also a join L...

7 Monate vor | 2

Beantwortet
Sorting/Grouping based on date for all years
The isbetween function can also help simplify a lot of the logical indexing to pull out the ranges of interest. tt = readtime...

8 Monate vor | 1

Beantwortet
How to make the following code valid for tables not only matrices
There are a few ways to rework the indexing to work with tables. By the way, I'm not sure what the loop does (ied doesn't appear...

8 Monate vor | 0

Beantwortet
How do I find a single value by corresponding data in 2 different tables?
It sounds like you are trying to align these two things based on time? If so, check out the synchronize method of timetable. The...

11 Monate vor | 0

Beantwortet
Replace string values in a table
This is what categorical is built for! When you create the categorical, you can specify the data, value set, and category names....

11 Monate vor | 0

Beantwortet
How to extract table data based on column values?
One thing to watch out for is that the char vectors contained in the cell arrays (celltrs) can vary in the number of characters,...

11 Monate vor | 0

| akzeptiert

Beantwortet
I want to separate each gait cycle and keep each cycle in a row of a table.
If you separate each cycle into a separat row, the rows will likely have data of different lengths, which then gets hard to work...

etwa ein Jahr vor | 0

| akzeptiert

Beantwortet
Problem with datetime in German
We’re aware of the issues with parsing month abbreviations in some locales, and we're looking at ways to improve this. In this c...

etwa ein Jahr vor | 1

Beantwortet
Creating a for loop that goes through 12 month data in sets of 2
T = readtable('Levenmouth7MWTurbineData2019.csv') ; T.month = month(t.disc_TimeStamp); tiledlayout(3,2) for m = 1:2:12 m...

etwa ein Jahr vor | 0

| akzeptiert

Beantwortet
Multi Row Tables / Combine information where row is equal?
You can use varfun to apply the cumsum function to each group defined by Parset1. Parset1=['A';'A';'B';'B']; Parset2=['x';'y';...

etwa ein Jahr vor | 1

| akzeptiert

Beantwortet
Why am I getting the following datetime error message?
I think it's just a typo in your timestamp format spec: ss.sssZ should be ss.SSSZ

etwa ein Jahr vor | 0

| akzeptiert

Beantwortet
How to make a new table from two different table with common value?
You should be able to use innerjoin on T1 and T2 - no need for C. The innerjoin function calculates the equivalent of C as an in...

mehr als ein Jahr vor | 0

Beantwortet
Summarize two tables of different data and dates into exact matches of one of the two datasets
Another way to solve this is to synchronize the lower-resolution chemistry timetable to the higher-resolution discharge data. My...

mehr als ein Jahr vor | 0

Beantwortet
How to handle NAN when summing
You can pass a flag to sum to 'omitnan'.

mehr als ein Jahr vor | 0

| akzeptiert

Beantwortet
How to match trial number to time stamps given two sets of data?
Assuming your timestamps are durations (you probably want A to be a timetable with duration row times), you can use the isbetwee...

mehr als ein Jahr vor | 0

| akzeptiert

Mehr laden