decimalPlaces error

[jmshimParticipant]

hello please help me

my test data is

var sampleData = [{
a: -10.35,
b: 14.5
}, {
a: 10,
b: 2.5
}, {
a: 10,
b: 0.2
}, {
a: 100,
b: 205
}, {
a: 1,
b: 100
}, {
a: 5.11,
b: 10.13
}, {
a: 20.13,
b: 10.13
}, {
a: 600,
b: 300
}];
var settings = {
title: “Logarithmic Scale Axis Example”,
description: “Sample logarithmic scale axis with base 2″,
enableAnimations:true,
animationDuration:1000,
padding: {
left: 5,
top: 5,
right: 5,
bottom: 5
},
titlePadding: {
left: 0,
top: 0,
right: 0,
bottom: 10
},
source: sampleData,
enableAnimations: true,
categoryAxis: {
dataField: ”,
description: ”,
showGridLines: true,
showTickMarks: true
},
seriesGroups: [{
type: ‘column’,
valueAxis: {
visible: true,
title: { text: ‘Daily Closing Price<br>’ },
tickMarks: { color: ‘#BCBCBC’ },
labels: {
formatSettings: {
decimalPlaces: 0
}
}
},
series: [{
dataField: ‘a’,
displayText: ‘A’
}, {
dataField: ‘b’,
displayText: ‘B’
}]
}]
};
$(‘#jqxChart’).jqxChart(settings);

and i’m setting decimalPlaces = 0 but chart show decimalPlaces =3

[MartinParticipant]

Hello jmshim,

This is because you have a column with value 0.2 that can not be displayed if the decimal places are set to 0.
If you remove it then you will get the expected outcome.
Here is an Example.

Best Regards,
Martin Yotov

jQWidgets team
https://www.jqwidgets.com

[jmshimParticipant]

thank you Martin Yotov!

but i have one question
My data has negative and decimal points ex(-4.555 or 2.666 ->>> -4,3). Is there any way to set it in the chart options?

[ivanpeevskiParticipant]

Hi jmshim,

Unfortunately, it is not possible to display 0 or negative values in a logarithmic scale since it is mathematically impossible for a logarithm to be equal to those values.
In your case, I suggest using a linear scale with unitInterval set to 100: https://jsfiddle.net/k1fq5y62/
Or you can show your data in absolute values(example: -10 -> 10) and use the colorFunction to show users which values are supposed to be negative:
https://jsfiddle.net/u2e941z8/ – In the example, red values are negative and green are positive

I hope this answers your question. If you have any other problems, please do not hesitate to contact us again!
Best Regards,
Ivan Peevski

jQWidgets team
https://www.jqwidgets.com

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