Answered

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...

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...

2 years ago | 0

| accepted

Answered

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';...

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';...

2 years ago | 1

| accepted

Answered

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

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

2 years ago | 0

| accepted

Answered

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...

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...

2 years ago | 0

Answered

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...

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...

2 years ago | 0

Answered

How to handle NAN when summing

You can pass a flag to sum to 'omitnan'.

How to handle NAN when summing

You can pass a flag to sum to 'omitnan'.

2 years ago | 1

| accepted

Answered

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...

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...

2 years ago | 0

| accepted

Answered

How can I compute the mean value over a time interval?

If you have, for example, data once per second for an hour and you want to calculate mean values for each minute, I'd recommend ...

How can I compute the mean value over a time interval?

If you have, for example, data once per second for an hour and you want to calculate mean values for each minute, I'd recommend ...

3 years ago | 0

Answered

Plot data from a table that has years in the rows and months in the columns

Here's another way to tackle this, sticking with using table to contain your data. t = readtable('NOAA_CPC_OceanicNinoIndex.xls...

Plot data from a table that has years in the rows and months in the columns

Here's another way to tackle this, sticking with using table to contain your data. t = readtable('NOAA_CPC_OceanicNinoIndex.xls...

3 years ago | 1

Answered

Loop through date time heart rate data

Can you assume that the data is always sampled uniformly every 2 minutes? That can simplify things, but the code below should be...

Loop through date time heart rate data

Can you assume that the data is always sampled uniformly every 2 minutes? That can simplify things, but the code below should be...

3 years ago | 0

Answered

create a 2 dimensional table from a table containing multidimensional entries

Check out the splitvars function.

create a 2 dimensional table from a table containing multidimensional entries

Check out the splitvars function.

3 years ago | 0

Answered

Retime data aggregation for ID

Another approach is to unstack the timetable based on the sensor ID, so you'd have a wide timetable with separate variables temp...

Retime data aggregation for ID

Another approach is to unstack the timetable based on the sensor ID, so you'd have a wide timetable with separate variables temp...

3 years ago | 0

Answered

Timetable - loop through days to check for a condition occurring during midday the day prior to midday of the current day

As a starting point, take a look at the retime function. I think the easiest way to do this is create a copy of the timetable,...

Timetable - loop through days to check for a condition occurring during midday the day prior to midday of the current day

As a starting point, take a look at the retime function. I think the easiest way to do this is create a copy of the timetable,...

3 years ago | 0

| accepted

Answered

How to plot the graph according to the time

Read the data in as a timetable, You can pull out all the data where the hour is 8 by doing: tt8 = tt(tt.Time.hour == 8, :) Th...

How to plot the graph according to the time

Read the data in as a timetable, You can pull out all the data where the hour is 8 by doing: tt8 = tt(tt.Time.hour == 8, :) Th...

3 years ago | 1

Answered

Compiled Function trying to access non-existent @tabular\hasvars.m method (matlab 2020a)

I looked into that warning, and you can safely ignore it. It is also not present in R2020b.

Compiled Function trying to access non-existent @tabular\hasvars.m method (matlab 2020a)

I looked into that warning, and you can safely ignore it. It is also not present in R2020b.

3 years ago | 0

| accepted

Answered

Cumulative sum within group, reset when encounters a 0

It took me a while to come up with a way to do this without looping, then it clicked! You need to create groups based on where t...

Cumulative sum within group, reset when encounters a 0

It took me a while to come up with a way to do this without looping, then it clicked! You need to create groups based on where t...

3 years ago | 0

Answered

How to combine two tables with measurements taken over the same range but different intervals?

This is a tricky problem. I agree that conceptually it seems like a join, but you don't have exact matches in start/end between ...

How to combine two tables with measurements taken over the same range but different intervals?

This is a tricky problem. I agree that conceptually it seems like a join, but you don't have exact matches in start/end between ...

3 years ago | 0

Answered

Extract partial data from datetime using logics/vectorization

I would extract the time components first and then deal with grouping by day of the week. It's easy to keep this all organized i...

Extract partial data from datetime using logics/vectorization

I would extract the time components first and then deal with grouping by day of the week. It's easy to keep this all organized i...

3 years ago | 0

| accepted

Answered

Sort cell array by datetime

Even better, since you're working with data where each column has a different type, consider using a timetable. t = table2tim...

Sort cell array by datetime

Even better, since you're working with data where each column has a different type, consider using a timetable. t = table2tim...

3 years ago | 1

Answered

Avoid datetime changes due to saving daylight

Do you need to use time zones in your app? In MATLAB, you can work with "unzoned" datetimes, where Daylight Saving Time doesn't ...

Avoid datetime changes due to saving daylight

Do you need to use time zones in your app? In MATLAB, you can work with "unzoned" datetimes, where Daylight Saving Time doesn't ...

3 years ago | 0

| accepted

Answered

Hourly and 6-hourly average of data in timeable

If you want the rolling average, use smoothdata, with 'movmean' as the method and (e.g.) hours(6) as the window. If you want non...

Hourly and 6-hourly average of data in timeable

If you want the rolling average, use smoothdata, with 'movmean' as the method and (e.g.) hours(6) as the window. If you want non...

3 years ago | 0

| accepted

Answered

Table to variable (I have a full path name)

If you want to read that spreadsheet into a MATLAB table, use readtable rather than load.

Table to variable (I have a full path name)

If you want to read that spreadsheet into a MATLAB table, use readtable rather than load.

3 years ago | 0

Answered

Return rows from a table with a unique combination of categories

You don't say what's not working, but I think you're probably running into findgroups on an array throwing an error. To find gro...

Return rows from a table with a unique combination of categories

You don't say what's not working, but I think you're probably running into findgroups on an array throwing an error. To find gro...

3 years ago | 0

| accepted

Answered

How do I convert monthly data to quarterly using as the value of the quarter the value of the 1st month of each quarter?

Another timetable option is to use retime with the 'firstvalue' aggregation method.

How do I convert monthly data to quarterly using as the value of the quarter the value of the 1st month of each quarter?

Another timetable option is to use retime with the 'firstvalue' aggregation method.

3 years ago | 0

Answered

Creating n number of tables using already present table in matlab

I would advise that in many cases, you're better off adding a grouping variable based on the conditions you described and doing ...

Creating n number of tables using already present table in matlab

I would advise that in many cases, you're better off adding a grouping variable based on the conditions you described and doing ...

3 years ago | 0

Answered

Problem with processing large data set

I'm not sure of the BiLSTM-CNN input requirements, but for starters you're probably better off storing those timeseries as rows ...

Problem with processing large data set

I'm not sure of the BiLSTM-CNN input requirements, but for starters you're probably better off storing those timeseries as rows ...

3 years ago | 1

Answered

Datetime in a loop that concatenates NetCDF

The last line of your loop: time(Nfiles)=time; should be time_all(Nfiles)=time; so that you update time_all. ...

Datetime in a loop that concatenates NetCDF

The last line of your loop: time(Nfiles)=time; should be time_all(Nfiles)=time; so that you update time_all. ...

3 years ago | 0

Answered

How to convert a column in a table to date format for plotting a time series?

There's no need to replace the 'T' and 'Z' literals. Datetime formats can include literals: datetime(Column_of_Time_Strings,'...

How to convert a column in a table to date format for plotting a time series?

There's no need to replace the 'T' and 'Z' literals. Datetime formats can include literals: datetime(Column_of_Time_Strings,'...

3 years ago | 0

Answered

Merge scatterhists to one- Create

If you combine your SHALLOW and DEPTH data and add a simple grouping variable based on the height of SHALLOW and DEPTH, you can ...

Merge scatterhists to one- Create

If you combine your SHALLOW and DEPTH data and add a simple grouping variable based on the height of SHALLOW and DEPTH, you can ...

3 years ago | 0

Answered

Formatting .dat gps file

Unless there's an existing reader for that file format, you're going to need to read it in as text and parse it into something m...

Formatting .dat gps file

Unless there's an existing reader for that file format, you're going to need to read it in as text and parse it into something m...

3 years ago | 0