Duncan Po

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Split arrays in table into separate rows
I think you can do what you want in several steps. % Convert your cell arrays in voxel_coord, R2s, and MT into arrays using cel...

ongeveer 3 jaar ago | 1

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Select a cell table
If you want the value in RESP0234_SOZ_TABLE{2,2}, use eval to evaluate that expression: for i=1:length(numbers); j=numbers...

ongeveer 3 jaar ago | 0

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Timetable_Averaging values from each month
Use groupsummary with 'monthofyear' binning T = timetable(datetime(2000,1:(12*21),1)', rand(12*21,1), 'VariableNames', {'USDM_i...

ongeveer 3 jaar ago | 0

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Efficient way to standardize large amounts of text
You may be able to use patterns. For example, suppose the standard format is letters followed by underscore followed by numbers,...

ongeveer 3 jaar ago | 0

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How to solve the Operator '-' is not supported for operands of type 'table'?
z should be a matrix instead of a table. z is defined using parentheses indexing in your code: z = LSinclination(:,5); This re...

meer dan 3 jaar ago | 0

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splitting column in table without creating new variables
Unstack may be the function you need to convert your table into a column for each trial, and then use braces indexing to convert...

meer dan 3 jaar ago | 0

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Merge columns with different cell input
Can you convert your empty char '' into empty array []? Tables can be concatenated with empty array but not empty char: t = tab...

meer dan 3 jaar ago | 0

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plot specific time points of everyday in an automated data
See this example of checking the hour component of a datetime, and then using logical indexing to extract a time range: dt = da...

meer dan 3 jaar ago | 0

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Plotting acceleration vs time on Matlab from accelerometer data that doesn't have a time column
You can create a timetable, and just supply the start time and frequency. Timetable will compute the timestamps for your data. F...

meer dan 3 jaar ago | 0

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Accessing data in matrix entries of tables
You can use multiple sets of curly braces {} to index into cells, and then use parentheses to index into the resulting arrays, l...

meer dan 3 jaar ago | 1

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Categorize data in if else statement
You can discretize the BMI values into categories and then count them, like this: >> c = discretize(BMI, [0 18.5 24.9 29.9 34.9...

meer dan 3 jaar ago | 1

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Find maximum for each Image in table
You can use groupsummary to find the maximum value of each group: T1 = groupsummary(T, 'MaxPosition', 'max', 'Intensity');

meer dan 3 jaar ago | 2

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creating table of finely spaced xy points that represent a box corner
meshgrid may be the function you are looking for. For example, >> [x,y] = meshgrid(1:5,1:5) x = 1 2 3 4 ...

meer dan 3 jaar ago | 0

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Rapid access and data manage of a table with cell array in the columns
You can use cellfun. For example, to compute the maximum of each column of the H3raw cell column for each row, do this: cellfun...

meer dan 3 jaar ago | 0

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Plotting Timetable in Matlab
The line: Time=TR({'05-05-2020','05-06-2020 00:00:00'},:); only extracts two rows from TR. So Time only has two rows. Then w...

bijna 4 jaar ago | 0

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Grouping based upon differences in time, with some small scatter
One way to do this is to use isbetween in a for loop, and then unique(, 'rows') to find the groups: t = datetime({'27-Aug-2020 ...

bijna 4 jaar ago | 0

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How can I track time periods under certain criteria?
You can put your data in a timetable and then use movsum like this: tt = readtimetable('Daily_Data_Thessaloniki.xlsx'); tt.thr...

bijna 4 jaar ago | 0

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PLOT ACTION IN TIME LAPS
Your data is best represented as a timetable in MATLAB. You can then use stackedplot to generate the visualization. haa = readt...

bijna 4 jaar ago | 1

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Spatial correlations with a timeseries
corr works on columns in 2D matrices. Your local temperature is a row, so you need to tranpose it: local_temp = local_temp...

bijna 4 jaar ago | 0

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Combine timetables vertically different variables
You can use outerjoin with MergeKeys option set to true. You need to specify your common variable names (in addition to 'Time') ...

bijna 5 jaar ago | 1

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How to stackedplot with text data
What do you expect to see with your text data in the plot? stackedplot ignores text data, but plots categorical data. If your ...

bijna 5 jaar ago | 0

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What unit does the frequency have (MATLAB Color Histogram)?
The Y axis is number of pixels. The image in the example is 384x512, so it has 196608 pixels.

ongeveer 5 jaar ago | 0

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Help with creating histogram
If you convert to categorical, you can sort the counts by descending order: a = randi(10,10,10); histogram(categorical(a), 'Di...

meer dan 5 jaar ago | 0

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Is there a way to plot multiple graphs in one "subplot" of a stackedplot figure?
stackedplot can plot multiple lines in the same axes. One way is to have a non-column matrix as one of your table variables: x ...

meer dan 5 jaar ago | 6

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I can't plot two lists as histograms as different colors on the same plot. Hist wants 'Numeric Input'
What does class(list1) return? If it returns anything other than a builtin numeric class, that would be the reason for your erro...

ongeveer 7 jaar ago | 0

Answered
arrange multiple 2D histograms in 3D
You can use the hist function to plot one histogram, then grab its vertices from the resulting patch object. Pass these vertices...

meer dan 8 jaar ago | 1

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how to extract subbands from pyramidal directional filter bank/contourlet decomposition of an image?
You need the contourlet toolbox: <http://www.mathworks.com/matlabcentral/fileexchange/8837-contourlet-toolbox>

meer dan 8 jaar ago | 0

Answered
Two bar graphs - two data sets - different bin width
histogram/histcounts have builtin support for Freedman-Diaconis rule: histogram(x, 'BinMethod', 'fd') or [n, binedges] ...

meer dan 8 jaar ago | 0

Answered
When brushing 3-d scatter, why does the marker not change?
Are you using R2014b? There is a bug in that version. Good news is it is fixed in 15a, so if you update, brushing on scatter3 wi...

meer dan 8 jaar ago | 1

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How to do sliding window operation in Matlab?
R2016a has a new function movsum: >> x=[4,1,1,1,2,2,3,5,9,7,7,7,6,6,1,1,2,3,4,4] >> movsum(x,10,'EndPoints','discard') ...

meer dan 8 jaar ago | 2

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