
Louise Wilson
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Question
Creating a map using x/y data
I have X, Y, Z data where X and Y are lon and lat coordinates and Z is value of interest. All variables are 12500*1800 (too larg...
ungefär 2 månader ago | 0 answers | 0
0
answersQuestion
Add geographic data to pcolor plot
Can anyone advise me as to how I can add geographic information to a pcolor plot? Each of the variables I have is a 12500x800 ...
ungefär 2 månader ago | 1 answer | 0
1
answerQuestion
Adding datetime to spectrogram x axis
I have six acoustic files which were recorded consecutively. I have concatenated the data and shared it here: https://drive.go...
3 månader ago | 1 answer | 0
1
answerQuestion
Plot spectra and spectrogram of acceleration data
I have acceleration data for three planes (X,Y,Z) which is recorded using an accelerometer connected to a recorder (referred to ...
5 månader ago | 1 answer | 0
1
answerQuestion
Mean of multidimensional array
I have a multidimensional array: 1000x72x4. I would like to know the mean of all four sheets and so provide a single 1000x72 ma...
6 månader ago | 1 answer | 0
1
answerChange projection of netcdf data and convert from UTM to lat/lon
I have since realised that it is not logical to modify the spatial data in this way as it would break the regularity.
6 månader ago | 0
| accepted
Question
Interpolation(?) of 3D array
I have a 3D array (vardata) which contains sound pressure level data at a series of lat/lon coordinates for 91 different frequen...
6 månader ago | 1 answer | 0
1
answerQuestion
Change projection of netcdf data and convert from UTM to lat/lon
I have a netcdf file vardata=ncread('TL__Map1_15C_sand1__20mres_-36.265137N_174.790466','TLdata'); ncdisp('TL__Map1_15C_sand...
6 månader ago | 2 answers | 0
2
answersQuestion
Convert UTM to lat lon
I have a 290x480x90 array where the x and y are coordinates in UTM. I'd like to convert them to degrees minutes seconds and I'd ...
6 månader ago | 1 answer | 0
1
answerQuestion
Accessing (interpolating?) data in 3D array
I have been using Matlab for many years but this is my first time working with a 3D array. My data is 290x480x90 in the format l...
6 månader ago | 1 answer | 0
1
answerQuestion
Convert from linear to log scale and back again
I have include some example data. %fit curve [xData, yData] = prepareCurveData(log10(plot_data.xdata), plot_data.ydata); ft =...
6 månader ago | 1 answer | 0
1
answerQuestion
Reading and visualizing netcdf with vectors of differing lengths
This is my first time reading netcdf data. I can read the file and variables of interest as follows: vardata=ncread('TL__Map1_1...
6 månader ago | 1 answer | 0
1
answerQuestion
Datetimes don't seem to be recognised
Can anyone explain to me why this isn't working? For some reason, the datetime t is not recognised as occurring between times.t1...
7 månader ago | 1 answer | 0
1
answerQuestion
Exclude certain dates on x-axis using xlim or xtick?
I have attached my dataset and a plot to illustrate what I am trying to do. I would like to remove the blank spaces between the ...
7 månader ago | 1 answer | 0
1
answerQuestion
Can you exclude dates in date range using xlim?
I have a dataset where the x axis is time and the y axis is sound pressure level in dB. The data is recorded continuously on a 2...
7 månader ago | 1 answer | 0
1
answerQuestion
Discrepancy between datenum and datetime?
I am trying to plot some data (attached) . The figure wasn't displaying the data I knew I had, so I tried again using datetime ...
7 månader ago | 2 answers | 0
2
answersQuestion
Data, which isn't missing, appears to be missing in surf plot
Can anyone explain the gaps (white bars) which arise in my surf plot? The degree to which they appear changes depending on wheth...
8 månader ago | 0 answers | 0
0
answersQuestion
Plotting spectrograms for multiple files
I have multiple acoustic files for which I would like to plot a spectrogram on a single plot. I know how to plot one spectrogr...
8 månader ago | 1 answer | 0
1
answerQuestion
Align two signals using cross correlation
I have two four channel recorders and a total of six microphones. Since the time lag between the two recorders is ~5 seconds, I ...
10 månader ago | 1 answer | 0
1
answerQuestion
Is it possible to write an 'empty' cell in Matlab, not NaN?
I would like to write an empty cell in an output file which I will save as a .bty file. The attached file is an example. In th...
10 månader ago | 1 answer | 0
1
answerQuestion
How to plot successive rows of a table when value is true
I have attached an example data set. What I would like to do is plot successive rows together if the time between successive row...
10 månader ago | 1 answer | 0
1
answerQuestion
How to chose the correct line style?
I have created the attached plot. I have a large dataset with multiple entries, each representing different moving objects. I wa...
10 månader ago | 1 answer | 0
1
answerQuestion
Error/fault in code, 'Unrecognized function or variable'
I have the following loop within my script. The intention is to process thousands of files within a folder through the function ...
11 månader ago | 1 answer | 0
1
answerQuestion
Subset using time range following specific time
I have two tables (see attached screenshot.) Both tables have a list of datetimes. I want to select the value from counts_subset...
11 månader ago | 1 answer | 0
1
answerQuestion
readtable working differently for different files
I have a bunch of spreadsheets which all have the same format. However, when I read them in, they appear differently... folder=...
12 månader ago | 1 answer | 0
1
answerQuestion
How to fit a log curve to a scatterplot?
Could anyone advise me on how to a fit a curve to this plot? The y-axis is decibels and so logarithmic. I have tried the hel...
12 månader ago | 1 answer | 0
1
answerQuestion
Is it possible to retrieve data from a website?
I have a list of vessel MMSI numbers. I would like to take each, enter it into the search bar on this page 'https://www.vesselfi...
ungefär ett år ago | 0 answers | 0
0
answersQuestion
Saving matrix that contains cell arrays
Can anyone tell me the best way to save a large file that looks like this? I will be sharing it with colleagues to use in Matlab...
ungefär ett år ago | 1 answer | 0
1
answerQuestion
How to avoid Warning when assigning values to a table
Hello, I have the attached table. I create an empty table and then add each variable separately from the name of files in a fol...
ungefär ett år ago | 1 answer | 0
1
answerQuestion
Matlab is mixing MONTH and DAY up
Hello, I have a datetime array where the format is dd/MM/yyyy, but when I used ymd(), Matlab tells me that day is month and mont...
ungefär ett år ago | 1 answer | 0