Update the markdown documentation

repo_files/documentations/bar_chart.md

@@ -32,6 +32,7 @@ When you change the chart's state, it animates to the new state internally (usin
 |baselineY| defines the baseline of y-axis | 0|
 |extraLinesData| allows extra horizontal lines to be drawn on the chart. Vertical lines are ignored when used with BarChartData, please see [#1149](https://github.com/imaNNeo/fl_chart/issues/1149), check [ExtraLinesData](base_chart.md#ExtraLinesData)|ExtraLinesData()|
 |rotationQuarterTurns|Rotates the chart 90 degrees (clockwise) in every quarter turns. This feature works like the [RotatedBox](https://api.flutter.dev/flutter/widgets/RotatedBox-class.html) widget. You can have horizontal BarChart by changing this value to |0|
+|errorIndicatorData|Holds data for representing an error indicator (you see the error indicators if you provide the `toYErrorRange` in the [BarChartRodData](#BarChartRodData))|[ErrorIndicatorData()](base_chart.md#FlErrorIndicatorData)|
 
 ### BarChartGroupData
 |PropName		|Description	|default value|
@@ -59,7 +60,7 @@ enum values {`start`, `end`, `center`, `spaceEvenly`, `spaceAround`, `spaceBetwe
 |borderSide|Determines the border stroke around of the bar, see [BorderSide](https://api.flutter.dev/flutter/painting/BorderSide-class.html). When `null`, it defaults to draw no stroke. |null|
 |backDrawRodData|if provided, draws a rod in the background of the line bar, check the [BackgroundBarChartRodData](#BackgroundBarChartRodData)|null|
 |rodStackItem|if you want to have stacked bar chart, provide a list of [BarChartRodStackItem](#BarChartRodStackItem), it will draw over your rod.|[]|
-
+|toYErrorRange|If you want to show an error range on the rod, provide [FlErrorRange](base_chart.md#FlErrorRange)|null|
 
 ### BackgroundBarChartRodData
 |PropName|Description|default value|

repo_files/documentations/base_chart.md

@@ -63,7 +63,8 @@
 |:-------|:----------|:------------|
 |x|represents x on the coordinate system (x starts from left)|null|
 |y|represents y on the coordinate system (y starts from bottom)|null|
-
+|xError| Determines the error range of the data point using (FlErrorRange)[#FlErrorRange] (which ontains `lowerBy` and `upperValue`) for the x-axis|null|
+|yError| Determines the error range of the data point using (FlErrorRange)[#FlErrorRange] (which ontains `upperBy` and `upperValue`) for the y-axis|null|
 
 
 ### FlLine
@@ -186,3 +187,16 @@ Base class for all supported touch/pointer events.
 
 ### FLHorizontalAlignment
 enum values {`center`, `left`, `right`}
+
+
+### FlErrorIndicatorData
+|PropName| Description                                                 | default value          |
+|:-------|:------------------------------------------------------------|:-----------------------|
+|show| Determines showing or not showing error indicator/threshold | true                   |
+|painter| A callback that allows you to provide a custom painter for the error indicator| FlSimpleErrorPainter() |
+
+### FlErrorRange
+|PropName| Description                                                                    | default value          |
+|:-------|:-------------------------------------------------------------------------------|:-----------------------|
+|lowerBy| Lower value of the error range. It is subtracted from the spot value and shoul be positive| null|
+|upperBy| Upper value of the error range. It is added to the spot value and shoul be positive| null|

repo_files/documentations/line_chart.md

@@ -60,6 +60,7 @@ When you change the chart's state, it animates to the new state internally (usin
 |shadow|It drops a shadow behind your bar, see [Shadow](https://api.flutter.dev/flutter/dart-ui/Shadow-class.html).|Shadow()|
 |isStepLineChart|If sets true, it draws the chart in Step Line Chart style, using `lineChartStepData`.|false|
 |lineChartStepData|Holds data for representing a Step Line Chart, and works only if [isStepChart] is true.|[LineChartStepData](#LineChartStepData)()|
+|errorIndicatorData|Holds data for representing an error indicator (you see the error indicators if you provide the `xError` or `yError` in the [FlSpot](base_chart.md#FlSpot)).|[ErrorIndicatorData()](base_chart.md#FlErrorIndicatorData)|
 
 ### LineChartStepData
 |PropName|Description|default value|

repo_files/documentations/scatter_chart.md

@@ -25,7 +25,7 @@ When you change the chart's state, it animates to the new state internally (usin
 |scatterTouchData| [ScatterTouchData](#scattertouchdata-read-about-touch-handling) holds the touch interactivity details| ScatterTouchData()|
 |showingTooltipIndicators| indices of showing tooltip, The point is that you need to disable touches to show these tooltips manually|[]|
 |rotationQuarterTurns|Rotates the chart 90 degrees (clockwise) in every quarter turns. This feature works like the [RotatedBox](https://api.flutter.dev/flutter/widgets/RotatedBox-class.html) widget|0|
-
+|errorIndicatorData|Holds data for representing an error indicator (you see the error indicators if you provide the `xError` or `yError` in the [ScatterSpot](#ScatterSpot))|[ErrorIndicatorData()](base_chart.md#FlErrorIndicatorData)|
 
 ### ScatterSpot
 |PropName		|Description	|default value|
@@ -34,6 +34,8 @@ When you change the chart's state, it animates to the new state internally (usin
 |radius| radius of the showing spot| [8]
 |color| colors of the spot|// a color based on the values|
 |renderPriority| sort by this to manage overlap|0|
+|xError| Determines the error range of the data point using (FlErrorRange)[base_chart.md#FlErrorRange] (which ontains `lowerBy` and `upperValue`) for the x-axis|null|
+|yError| Determines the error range of the data point using (FlErrorRange)[base_chart.md#FlErrorRange] (which ontains `upperBy` and `upperValue`) for the y-axis|null|
 
 
 ### ScatterTouchData ([read about touch handling](handle_touches.md))