Introduction:-
In Oracle APEX, Event Drop Charts provide a powerful way to monitor and analyze events occurring over time, making it easier to identify patterns, trends, and anomalies. including setting up your data source, configuring the chart, and customizing it for optimal data representation. Enhance your data analysis capabilities with this insightful visualization tool
The following technologies has been used to achieve the same.
- Oracle APEX
- JavaScript
Why we need to do:-
Event Drop Charts are particularly useful In Oracle APEX, Event Drop Charts can be customized using JavaScript to enhance the visualization of time-series data, such as displaying customer interactions over time. A JavaScript function preprocesses the data by assigning unique index values to each series, grouping events by customer. It adds reference lines for visual separation and maps series names to y-axis tick labels, making the chart more intuitive. A dynamic action in APEX ensures these customization are applied after the chart refreshes, with the X-axis labeled “Date of Sales” and the Y-axis labeled “Customer” for clear visualization.
How do we solve:-
Step1: Make a fresh page Choose a line chart to insert the SQL query into, then eliminate the breadcrumb. And label column property select as sales_date X-axis of chart and select the values column as qty
select sales_date,quantity,customer from eba_demo_chart_orders;
Step2: even set the drop chart revision as a static ID in order to use it in the development of a Java script that would modify the present situation and run Java script code for
dynamiaction.navigate to the attributes time axis type ==>Set the Mixed Frequency to the time value axis for the desired outcome, then scroll and zoom to choose the delayed
Step3: Enabling the show switch lender legends on the chart and hide and show should be selected the Re-scale
Step4:This JavaScript function customizes chart options for visualizing event drop data. Here’s a detailed explanation:
Variable Initialization:
yAxisLineRefs: An array to store y-axis reference lines.
seriesNamesArray: An array to store series names.
Data Filter Callback:
- dataFilter: A function called when data is retrieved, allowing manipulation of the series.
- Loops through each series (series) and each item within the series.
- Sets the valueof each item to the index of the series (i), ensuring each series has a unique value.
- Adds a reference line at i + 0.5to yAxisLineRefs for visual separation of series.
- Pushes each series name to seriesNamesArray.
Series Name Mapping:
this.seriesName: Assigns seriesNamesArray to this.seriesName.this.eventNamesFn: A function to format values into series names for yAxis.tickLabel.
YAxis Attributes:
Uses $.extend to add referenceObjects to options.yAxis, incorporating yAxisLineRefs.
Return Options:
Returns the modified options.This function is used to preprocess data and enhance the visualization of event drop charts by clearly distinguishing different series and mapping values to series names.
Code:
function( options ) {
var yAxisLineRefs = [],
seriesNamesArray = [];
options.dataFilter = function( data ) {
for ( var i = 0; i < data.series.length; i++ ) {
for ( var j = 0; j < data.series[ i ].items.length; j++ ) {
data.series[ i ].items[ j ].value = i;
}
// Create reference lines to separate each series
yAxisLineRefs.push({
type: ‘line’,
color: ‘rgba(196,206,215,1)’,
value: i + 0.5
});
// Array of series names, for use in eventNames function
seriesNamesArray.push( data.series[ i ].name );
}
return data;
};
this.seriesName = seriesNamesArray;
this.eventNamesFn = {
format: function( value ) {
return (value < seriesName.length) ? seriesName [ value ] : “”;
}
};
// Set additional yAxis attributes
$.extend ( options.yAxis, {
referenceObjects: yAxisLineRefs
} );
// Set chart initialization options
return options;
}
Step5: Select a customer sales region and go to column mapping series name select customer and line to specified the dotted to rendered on the chart and maker part given the yes shape is cricle
Step6: enter the titel for Axis X-axis is Date of Sales and Y Axis Customer below picture mentioned selected the items
Step7: Create a Dynamic Action Event is After Refresh selection type is Region and true action is excute the java script
The code mofied the chart y axis check lables to display as series name of numberical values
Code:
apex.region(‘sales’).widget().ojChart(‘option’,’yAxis.tickLabel.converter’, eventNamesFn );
Conclusion
we explored how Event Drop Charts in Oracle APEX can effectively visualize time-series data. This tool is particularly useful for analyzing customer activity across different types of shops and sales dates. By following the step-by-step guide, you can set up, customize, and enhance your charts to monitor and identify patterns, trends, and anomalies. This method significantly aids in the yearly analysis of data, providing clear insights and improving decision-making processes.
Screenshots
