diff --git a/docs/03-Line-Chart.md b/docs/03-Line-Chart.md
index 35e518018..f62a20879 100644
--- a/docs/03-Line-Chart.md
+++ b/docs/03-Line-Chart.md
@@ -39,7 +39,7 @@ label | `String` | The label for the dataset which appears in the legend and too
xAxisID | `String` | The ID of the x axis to plot this dataset on
yAxisID | `String` | The ID of the y axis to plot this dataset on
fill | `Boolean` | If true, fill the area under the line
-cubicInterpolationMode | `String` | Algorithm used to interpolate a smooth curve from the discrete data points. Options are 'default' and 'monotone'. The 'default' algorithm uses a custom weighted cubic interpolation, which produces pleasant curves for all types of datasets. The 'monotone' algorithm is more suited to `y = f(x)` datasets : it preserves monotonicity (or piecewise monotonicity) of the dataset being interpolated, and ensures local extremums (if any) stay at input data points. If unknown or `undefined`, this options is treated as 'default'.
+cubicInterpolationMode | `String` | Algorithm used to interpolate a smooth curve from the discrete data points. Options are 'default' and 'monotone'. The 'default' algorithm uses a custom weighted cubic interpolation, which produces pleasant curves for all types of datasets. The 'monotone' algorithm is more suited to `y = f(x)` datasets : it preserves monotonicity (or piecewise monotonicity) of the dataset being interpolated, and ensures local extremums (if any) stay at input data points. If left untouched (`undefined`), the global `options.elements.line.cubicInterpolationMode` property is used.
lineTension | `Number` | Bezier curve tension of the line. Set to 0 to draw straightlines. This option is ignored if monotone cubic interpolation is used. *Note* This was renamed from 'tension' but the old name still works.
backgroundColor | `Color` | The fill color under the line. See [Colors](#chart-configuration-colors)
borderWidth | `Number` | The width of the line in pixels
diff --git a/samples/line-cubicInterpolationMode.html b/samples/line-cubicInterpolationMode.html
new file mode 100644
index 000000000..97dac46ca
--- /dev/null
+++ b/samples/line-cubicInterpolationMode.html
@@ -0,0 +1,113 @@
+
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+
+
+ Line Chart - Cubic interpolation mode
+
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\ No newline at end of file
diff --git a/src/controllers/controller.line.js b/src/controllers/controller.line.js
index 5b453b44b..b103907ea 100644
--- a/src/controllers/controller.line.js
+++ b/src/controllers/controller.line.js
@@ -90,6 +90,7 @@ module.exports = function(Chart) {
borderJoinStyle: custom.borderJoinStyle ? custom.borderJoinStyle : (dataset.borderJoinStyle || lineElementOptions.borderJoinStyle),
fill: custom.fill ? custom.fill : (dataset.fill !== undefined ? dataset.fill : lineElementOptions.fill),
steppedLine: custom.steppedLine ? custom.steppedLine : helpers.getValueOrDefault(dataset.steppedLine, lineElementOptions.stepped),
+ cubicInterpolationMode: custom.cubicInterpolationMode ? custom.cubicInterpolationMode : helpers.getValueOrDefault(dataset.cubicInterpolationMode, lineElementOptions.cubicInterpolationMode),
// Scale
scaleTop: scale.top,
scaleBottom: scale.bottom,
@@ -248,7 +249,7 @@ module.exports = function(Chart) {
var meta = me.getMeta();
var area = me.chart.chartArea;
- // only consider points that are drawn in case the spanGaps option is ued
+ // Only consider points that are drawn in case the spanGaps option is used
var points = (meta.data || []).filter(function(pt) { return !pt._model.skip; });
var i, ilen, point, model, controlPoints;
@@ -256,7 +257,7 @@ module.exports = function(Chart) {
return Math.max(Math.min(pt, max), min);
}
- if (me.chart.options.elements.line.cubicInterpolationMode == 'monotone') {
+ if (meta.dataset._model.cubicInterpolationMode == 'monotone') {
helpers.splineCurveMonotone(points);
}
else {