Retrieving data for a calculated plot

Hello

I created the differential plot attached with Matlab. Is it possible to retrieve the derivative data it used or do I need to calculate it myself?

G

[Monica Roberts]

Does this help?

f = openfig("1wavevec.fig"); % Figure handle
a = f.Children; % Axes handle
lines = a.Children; % Handles of all the lines
xdata = [];
ydata = [];
for i = 2:numel(lines) % The first line is a different length than the rest
    xdata = [xdata;lines(i).XData];
    ydata = [ydata;lines(i).YData];
end

[Gavin Seddon]

Yes, thanks. It has given the data.

G

[Gavin Seddon]

Hello Monica

I need to use this data but there is errors, can you help?

G

[Gavin Seddon]

these are the errors

CircHist wave.tab

Error using CircHist

The value of 'data' is invalid. Expected input to be one of these types:

double, single, uint8, uint16, uint32, uint64, int8, int16, int32, int64, cell

Error in CircHist (line 534)

parse(pr,data,varargin{:});

>> CircHist (xdata, ydata)

Error using CircHist

The value of 'edges' is invalid. Expected input to be a vector.

Error in CircHist (line 534)

parse(pr,data,varargin{:});

>> CircHist wave.tab(xdata, ydata)c

Error using CircHist

The value of 'data' is invalid. Expected input to be one of these types:

double, single, uint8, uint16, uint32, uint64, int8, int16, int32, int64, cell

Error in CircHist (line 534)

parse(pr,data,varargin{:});

the data are vectors, is this a problem since the hist is angle and deviations

[Star Strider]

I looked at the data in this file.

One way to recover the 5003 Line objects is:

filename = '1wavevec.fig';

F = openfig(filename);

Ax = gca;

Lines = findobj(gca, 'Type','Line')

for k=1:numel(Lines)

xv{k,:} = Lines(k).XData;

yv{k,:} = Lines(k).YData;

end

However the rest of it makes essentially no sense. It appears to be entirely made up of collinear quiver arrows and nothing else. I have no idea how to recover any information other than the quiver arrows that comprise each line.

It will likely be necessary to calculate whatever data were used to create this plot and use that, or re-plot the existing data without using the quiver function. I doubt that anything meaningful can be recovered from the file as it exists here.

.

Answer 1

[Gavin Seddon]

Thanks but I need to get theangle the fig rotates through but that is off topic.

G