Android Question mpChartLib

[Cenny]

Hi,

When feeding altimeter data into an app using mpChartLib it gives this graph
However when I import the data into a csv file it yields
As you can see there is a difference at the bottom.
Anyone an idea what might cause the negative spikes in the mpChartLib graph?

Cenny

 

[klaus]

Looking at the tow images it seems that in the first one the points are joint with cubic splines and in the secondone with straight lines.
Meaning cubic lines through the data points, removing the 'knees' in the line ?
This might be a property of the chart.

Example:
Blue: points joined with straight lines.
Red: points joint with cubic splines.
This happen when there are big and steep changes.

 

[Johan Schoeman]

@klaus is probably correct. See if you have these two lines in your code

mlc1.DrawCubicGraph = True
mlc1.CubicIntensity = 0.xx

Set DrawCubicGraph to false and/or set the intensity to 0.0.

If it is not the case then upload a small sample project and I will see if there might be anything else that might cause it.

 

[Cenny]

Looking at the tow images it seems that in the first one the points are joint with cubic splines and in the secondone with straight lines.
Meaning cubic lines through the data points, removing the 'knees' in the line ?
This might be a property of the chart.

Example:
Blue: points joined with straight lines.
Red: points joint with cubic splines.
This happen when there are big and steep changes.
View attachment 126226

Thanks for your help.

Looking at the tow images it seems that in the first one the points are joint with cubic splines and in the secondone with straight lines.
Meaning cubic lines through the data points, removing the 'knees' in the line ?
This might be a property of the chart.

Example:
Blue: points joined with straight lines.
Red: points joint with cubic splines.
This happen when there are big and steep changes.
View attachment 126226

thanks Klaus

 

[Cenny]

@klaus is probably correct. See if you have these two lines in your code

mlc1.DrawCubicGraph = True
mlc1.CubicIntensity = 0.xx

Set DrawCubicGraph to false and/or set the intensity to 0.0.

If it is not the case then upload a small sample project and I will see if there might be anything else that might cause it.

Thanks for your help.
i was not aware of these

Looking at the tow images it seems that in the first one the points are joint with cubic splines and in the secondone with straight lines.
Meaning cubic lines through the data points, removing the 'knees' in the line ?
This might be a property of the chart.

Example:
Blue: points joined with straight lines.
Red: points joint with cubic splines.
This happen when there are big and steep changes.
View attachment 126226

 

[Cenny]

Looking at the tow images it seems that in the first one the points are joint with cubic splines and in the secondone with straight lines.
Meaning cubic lines through the data points, removing the 'knees' in the line ?
This might be a property of the chart.

Example:
Blue: points joined with straight lines.
Red: points joint with cubic splines.
This happen when there are big and steep changes.
View attachment 126226

Thanks for your help.

 

[Cenny]

Thanks for your help.
i was not aware of these properties

 

[Cenny]

@klaus is probably correct. See if you have these two lines in your code

mlc1.DrawCubicGraph = True
mlc1.CubicIntensity = 0.xx

Set DrawCubicGraph to false and/or set the intensity to 0.0.

If it is not the case then upload a small sample project and I will see if there might be anything else that might cause it.

Problem solved when I follow your suggestions.
Once again thanks for the help