iCharts scaling and intervals MII 11.5

[Former Member]

I have an iChart (Line graph) that I have four pens, all of which have the auto scale is not checked. I have the global range checked and I set the min and max. The problem I have is the intervals from 100 (min) to 350 (max). How can I set it so it is every 10 or 15 or 25? The default for this is 25 when I set the YaxisMajorTickCount to 20. Since I do not know how to modify the intervals, I played around the tick counts.

document.Chart2.getChartObject().setGlobalMinRange(100);

document.Chart2.getChartObject().setGlobalMaxRange(350);

document.Chart2.getChartObject().setUseGlobalRanges(true);

document.Chart2.getChartObject().setGlobalAutoScale(false);

document.Chart2.getChartObject().setGlobalServerScaling(false);

document.Chart2.getChartObject().setYAxisMajorTickCount(20);

[Former Member · Accepted solution]

Hi Chip,

I did some experimenting - I figured there must be some underlying mathematical calculation involved that determines the intervals, and since I can't see the actual code behind it, this is what I came up with.

It looks to be a formula like this: 2(range) / desired interval. So, in your case, the range 100 - 350 yields 250, and say you want the intervals to be by tens.

2(250) / 10 = 500 / 10 = 50. So if you set the YAxisMajorTickCount to 50, the chart shows intervals by tens. Intervals of 15 are a bit more challenging, since 500 is not evenly divisible by 15. So I adjusted the range to 100 - 370 and got the intervals by 15.

Anyrate, maybe this is just crazy talk, but try it and let me know if it works for you

Kind Regards,

Diana Hoppe

[Former Member · Accepted solution]

I changed the chart settings and the intervals are now 11 not 15 like your results. However, changing the YAxisMajor from 50 to 35 did change the interval to 15 - 16 respectively.

document.Chart2.getChartObject().setGlobalMinRange(100);

document.Chart2.getChartObject().setGlobalMaxRange(370);

document.Chart2.getChartObject().setUseGlobalRanges(true);

document.Chart2.getChartObject().setGlobalAutoScale(false);

document.Chart2.getChartObject().setGlobalServerScaling(false);

document.Chart2.getChartObject().setYAxisMajorTickCount(50);

[Former Member · Accepted solution]

Hi Chip,

Looking at your code snippet, 2*270 = 540, which is not divisible by 50. But, if you change the YAxisMajorTickCount to 36, you should see the interval by intervals of 15, since 540/15 = 36 (36 being a whole number).

In other words, the range * 2 must be divisible by the desired inteval amount. Hope this makes sense.

Diana

[Former Member · Accepted solution]

Thanks. I will keep this in mind.