[SOLVED] Remove empty dates on Bar Graph
lazarus / 55-TAChart

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Odacir · 2016-05-05 21:12

Hi,

I trying to show a bar graph, with dates on X-axis, using a
DBChartSource.

The graph is OK, show the results, but not all days have values....
But the days without values is showed on graph. How to not show empty
values?

See the attachment. The table is the values.

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wp · 2016-05-06 08:30

Your dataset contains non-equally spaced date values which are used
for the x coordinates of the bars. Therefore, there are irregular gaps
between the bars.

Use the datapoint index as x instead. In case of a TDbChartSource,
just leave the FieldX empty. Now you'll see the indexes being plotted
along the x axis. To get the dates back as labels, add the name of the
date field to FieldText of the DBChartSource, and link the
DBChartSource to the Marks.Source of the Chart's BottomAxis. Set the
Style of the Marks (of the BottomAxis) to smsLabel.

Just look at the settings in the attached project (you'll need
TMemDataset)

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Odacir · 2016-05-06 19:45

WP, really thanks a lot! Your answer was perfect. Exactly what i
need!!!! 

Its possible show at top any bar, show the value of Y axis?

Really thanks for your time to help-me.

Have a good weekend!

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wp · 2016-05-06 20:07

Quote from: Odacir on May 06, 2016, 09:45:41 pmIts possible show at
top any bar, show the value of Y axis?
The series has a Marks property as well. Set its Style to smsValue to
show the data value. Format the text boxes using the other properties
of Marks.

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Odacir · 2016-05-06 20:35

One more perfect answer.

Thanks a lot WP

:-)