Big time AxisX formating problems

[User (Legacy)]

Pulling my hair out for the second straight day now trying to format dates

correctly on the X axis.  It simply doesn't work as documented.

Please explain how the chart attached to this message shows markers at

1/15/2005 and 1/31/2005 (and the third point is unlabeled) when the data

array has dates of 1/1/2005, 2/1/2005, and 3/1/2005!  Using the latest 6.2

build (Web Form).

Also attached is a capture of the data array that is passed to the list

provider.

This is basically all the code:

[User (Legacy)]

This is basically all the code:

DateTime date1, date2, date3;

date1 = new DateTime(2005, 1, 1);

date2 = new DateTime(2005, 2, 1);

date3 = new DateTime(2005, 3, 1);

ArrayList xValues = new ArrayList();

ArrayList yValues = new ArrayList();

xValues.Add(date1); xValues.Add(date2); xValues.Add(date3);

yValues.Add(3); yValues.Add(9); yValues.Add(3);

object[] arrays = new object[2];

arrays[0] = xValues;

arrays[1] = yValues;

chart1.Series[0].Gallery = Gallery.Lines;

chart1.AxisX.LabelsFormat.Format = SoftwareFX.ChartFX.AxisFormat.Date;

ListProvider listProvider = new ListProvider(arrays);

chart1.DataSourceSettings.DataSource = listProvider;

[Software FX]

The main thing you need to understand here is that the X-Axis labels are NOT

directly related to each one of your values, X-Axis labels are displayed

based on a range (Min and Max) and a step providing an even labeling across

the axis.

If you want to label each point instead of label the axis as a whole, what

you need to do is set those dates as labels and not as X-Values. Here is

how:

chart1.DataType[0] = DataType.Label;

chart1.DataSourceSettings.DataSource = listProvider;

Now having said that, if you do want to keep your X-Axis independent of your

points (kind of like the Y-Axis) then you can do a lot of things to

customize it the way you want it.

The first thing you need to do is the Chart gallery to Lines as follows:

chart1.Gallery = Gallery.Lines;

Otherwise, Gallery will remain at Bar (Default) and the X-Axis will behave 

completely different. The reasons for this are explained in the 

documentation under Data-Driven labels, but if you are not interested in Bar 

charts then you can simply add the line above, once you do this you will get 

labels at 1/15, 1/31, 2/15 and 2/28.Chart FX chose a step of 1/2 a month, 

starting on 12/31/04.

-- 

Francisco Padron

www.chartfx.com

[User (Legacy)]

> The main thing you need to understand here is that the X-Axis labels are

NOT

> directly related to each one of your values, X-Axis labels are displayed

> based on a range (Min and Max) and a step providing an even labeling

across

> the axis.

That explanation makes sense but what doesn't make sense is that a point

with a date of 1/1/2005 is plotted DIRECTLY above the X axis label of

1/15/2005.   It's like there is a complete disconnect between the plotted

points and the X axis scaling/labeling.  The center point (2/1/2005) is

roughly correct (though the X axis is labeled 1/31/2005) but the two outer

points are just not right.

> If you want to label each point instead of label the axis as a whole, what

> you need to do is set those dates as labels and not as X-Values. Here is

> how:

>

> chart1.DataType[0] = DataType.Label;

This is what I'll try next.  Thanks.

[User (Legacy)]

> If you want to label each point instead of label the axis as a whole, what

> you need to do is set those dates as labels and not as X-Values. Here is

> how:

>

> chart1.DataType[0] = DataType.Label;

The problem with that approach is now the points are evenly spaced

regardless of the actual time interval between them.  Definately not what I

want.

[Software FX]

> That explanation makes sense but what doesn't make sense is that a point

> with a date of 1/1/2005 is plotted DIRECTLY above the X axis label of

> 1/15/2005

As I said before, this "incorrect" labeling is caused by the wrong Gallery 

type being selected. Addin the line:

chart1.Gallery = Gallery.Lines;

Fixes this problem.

-- 

Francisco Padron

www.chartfx.com