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Show temperature differences in a dataset
Here you can see the difference between minimum and maximum taken over the 3rd dimension, which I can only assume is time? ...

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question on months&days in 2012
Now that you've basically solved it, here is my (hopefully correct) solution. Note that for scalars you can write && instead of ...

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datenum to UTC?
Yes, use datetime instead of datenum. t = datetime('10-Oct-2013 15:59:00','timezone','-04:00') t_unix = posixtime(t)...

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shifting time in timetable
Simply shifting the time without affecting the data TT.Time = dateshift(TT.Time,'start','day') Changing the format (hidi...

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Summary Statistics Table by group
You need to pass the table as input to *grpstats*. Assuming that *dsa* is a cell array with grouping variables, then change your...

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how to use imshow for this array?
It's not imshow but you could use imagesc instead imagesc(out_map) If you really want to use imshow, then B = mat2g...

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Generate data from a image plot with colour code as reference.
I'd approach this by the following steps. load image with axes and everything: I = imread('FileName.png'); imshow(I) ...

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exstract consecutive duplicate element of array
A is your matrix. This line removes duplicates: A([false diff(A)==0]) = []; Or you could expand it to this, given your v...

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Subscript indices must either be real positive integers or logicals.
It's hard to tell without having some input, but these types of lines are definitely wrong: ra(2i)=1; *i* is being inter...

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Reading pixels of an image
Indexing works by going through the matrix column by column, so that would be (1,5) in your example. Don't be afraid to test thi...

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How would i display a matrix as a graph?
Here's a custom plot type I made. It may look upside down, but the value on the y-axis denotes the row number. The "peak value" ...

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Surface plot of vectors with x and y vectors as index
After meshgrid you need to interpolate. For example z = griddata(xx, yy, zz, x, y) Then you can plot surf(x, y, ...

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Based on Column 3 values how to get specific column 1 values?
fid = fopen('sample.txt') out = textscan(fid,'%f%f%f','headerlines',1); fclose(fid) A = cell2mat(out); id0 = f...

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Draw a discontinuous line
Do not use indexed variable names. Build a 2xn matrix instead. x = 0.7000 1.8000 1.3000 2.2000 y = ...

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plotting colorcoded points on a map
Try this: scatterm(long_lat(:,2),long_lat(:,1),[],sen_s) I assume sen_s is the variable you want colorcoded. Adapt the c...

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Plot of maximum value of chosen column in matrix
In this case you could simply find the max in each column in one go [vm,idx] = max(M); %maximum of each column plot(t,M); ...

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Help to understand Matlab code
[m n ~] = size(im) ~ basically means "omit this output", and is totally useless in this context. It is useful in other case...

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how to find time difference between 2 times , in milliseconds.
Just work with duration format. t={'18:42:45.813' '18:42:46.028' '18:42:46.139' '18:42:46.359' '18:42:46.463' ...

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Seperate the data of a table
Just use logical indexing T{strcmp(T{:,1},'Fossil Gas'),end} The line strcmp(T{:,1},'Fossil Gas') returns a logi...

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Plot of confidence interval with fill
Nothing wrong, you just happen to have very narrow confidence bounds. <</matlabcentral/answers/uploaded_files/137818/untitle...

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How to make a scatterplot
Let Y be your matrix with data, you can simply make a scatterplot like this: x = 61:70; h = plot(x,Y,'bo','markerfaceco...

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how to read .dat file using txtscan ?
You can use readtable since the data is tabular. T = readtable('AE33_AE33-S02-00184_20170102.dat','headerlines',8) ...g...

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How to make a 2-D colormap with coordinates
Use a surface object surf(lon, lat, z) The data must be gridded, so you may have grid the data like this [LON,LAT]...

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Squared heatmap with random transition; animation
You could also use scatter with a superlarge markersize. figure; colormap([1 1 1;1 1 0;1 0 0;0 0 1;0 1 0]); [...

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how could avoid too have loop in big data
You can use findgroups/splitapply or put the data in a table and use varfun or grpstats. Upload some data if you need code. ...

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How to make a graph that shows evolution of a variable in time through different depths in a lake.
Just create a surface object. d = is your depth (1x38) t = is your time (1x3705) Te = is your temperature (3705...

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How can make arrows into the line step by step?
What you see on the figure is a quiver3 plot, where the arrows describe velocity. You did not provide any velocity data, but you...

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how to handle variable time stamped long time series data?
# Load data # Put data in two timetables # Use synchronize # Step 1-3 did not work? Upload the data.

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colour map scatter with multiple groups / variables
I would probably just create a new axes for each new scatter object. Each object then scales automatically and the same method w...

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Interpolate gridded matrix row-wise
Normally you could achieve this easily by interpolating over rows with a function that does not extrapolate by default. I believ...

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