It would be quite easy to write a dataset plugin to do the conversion from data->text, but automatically allowing such expressions in plotting widgets would require some work.

Jeremy

On 02/10/13 22:31, Joseph Xu wrote:
How hard would it be to allow text datasets to be generated from
expressions? Then one can specify the number formatting with the
standard python formatting strings like "{:03}".

On Mon, Sep 30, 2013 at 3:30 AM, Jeremy Sanders
<[email protected]> wrote:
Dear All

For the next release, I've added support for non-text datasets as labels.
There isn't any support for how the numbers are formatted, however. It might
be useful to have a number or date to text dataset plugin to do the
conversion, however.

Jeremy

Joseph Xu wrote:

Hi Benjamin:

Thanks, that works! The only problem is that the labels don't
automatically update when the dataset it's based on changes, but it's
not a big deal.

Joseph

On Mon, Sep 23, 2013 at 8:47 PM, Benjamin K. Stuhl
<[email protected]> wrote:
On 9/23/2013 5:38 PM, Joseph Xu wrote:

I'm trying to make a bar chart with numeric labels at the top, kind of
like this:

http://www.dplot.com/barchart/barchart3_h600.png

I tried to do this by adding an additional x-y plot with hidden
markers and the bar chart length for both the y position and the
labels. However, it seems like you can't use numeric data sets for
labels. I tried some other things, like creating a dataset using
"str(y)" for the expression, but that fails also. Is there any way to
hack around this?


Hi Joseph,
   Your idea about creating a dataset using str(y) is a good one, it just
takes a bit more typing at the veusz console command line. If your
numeric dataset is named 'y', you could create a text label dataset by

SetDataText('y_labels', [ str(v) for v in GetData('y')[0] ])

for example. I hope this helps with your goal!

Regards,
-- BKS




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