Retrieving data for a calculated plot

Question

Gavin Seddon 2022-5-17

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1721335-retrieving-data-for-a-calculated-plot

回答： Gavin Seddon 2022-8-2

1wavevec.fig

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

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Gavin Seddon 2022-7-31

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 2022-7-31

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.

.

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