Yes, I want to be able to scale the axis and the points.

Hi, I am having some issues configuring a bottom axis in logarithmic mode. I have a dataset of points (x,y). The x values are time in minutes, from 5 seconds to 60minutes. The time points are: between 5" and 1' : per 5 seconds between 1' and 10' : per 1 minute between 10' and 60' : per 5 minutes So,...

Thanks for the help - here's the result

Hello,

I want to draw a hyperbole with the equation y = a + b/x
What would be the best way to achieve this ?
I thought of a TFastLineSeries with a TeeFunction y = f(x)
Then set the bottom axis min/max to the required range
Or is there a better way ?

Thank you

Hi, I am using a 2-pixel-wide vertical cursor in my chart. The chart is linked to various other components like for example a table, moving the record in the table moves the cursor in the chart to the related postion. The record in the table corresponds to a colorband in the table. As shown in the s...

Apparently, the culprit is the DBChart.AutoRefresh property. When I change the Begin/End update as below, the chart refreshes instantly when switching to / creating / destroying groups of series. The question is why the chart refreshes the data when a series is destroyed which is not even linked to ...

Hi, I tried it but it does not seem to change anything. However, when I debug on the line Series.Free I get the call stack as in the attached file. The series I am destroying is not linked to a datasource though, the points are just added manually. Edit: when i create the series and populate them, i...

Hi, I have a TDBChart which contains various series, some linked to a datasource and others created and populated at runtime. In the attached screenshot there are TAreaSeries with custom vertical axes created at runtime. Before I (re)create the series, I destroy the series as in code below. The prob...

Hi, I got a access violation because there are also null points so the mark position object can be nil. I have a central procedure called RefreshChart. All the series are created at runtime depending on the settings the user selects. The very first time when the form is created and the chart is refr...

Hi, I am using version 8.08 with Delphi 2009. I can't find the MarksOnBar property, but since you say it's not optimal for stacked bars, I think I will go for the custom option. I tried code like this: procedure TFramePeriodicChart.RefreshMarks; var I,J: Integer; S: TChartSeries; begin for I := 0 to...

Hi, I have a application where I show volume distributions using stacked bars, as in the attached screenshot. I am displaying the volumes using the Marks but I am having some difficulty getting them in a readable position. Ideally I would like to have the Marks centered on each bar value. Is there a...

Thank you for the suggestions and the compliment.
I will try your suggestions and see which one works best. Thanks for the help

Sorry, I forgot the attachments.

Thank you for the helpful answer, it works. Since I create the series at run time, I set the OffsetPercent directly when creating the series instead of using the event. I attached a few more shots: iqo2_periodic3 and iqo2_periodic4 display the same period in weeks, but one with a single stackgroup, ...

Hi, I have groups of bar series in a chart, with 2 stack groups. Each color and group is a bar series. I have the MultiBar property set to mbStacked, and StackGroup set to 0 for first group and 1 for the second. Each group is on a custom y-axis, bottom axis is shared for all series. The bars of the ...