Teachers

This post will talk about conditional colours of bars with below like scenarios.

Sample Scenario : 
Print bar color as red when bar value <=2000
Print bar color as green when bar value >2000 and <10000
Print bar color as black when bar value>=10000

Scenario 2 : 
When representing -Ve values on charts .. this kind of representation is preferable. 

Code is Taken from Reference links :


function changeBars(){
var cccOptions = this.chartDefinition;

// For changing extension points, a little more work is required:
var eps = Dashboards.propertiesArrayToObject(cccOptions.extensionPoints);

// add extension points:
eps.bar_fillStyle = function getColor(){
var val = this.scene.vars.value.value;

if(val > 0 && val <= 5000){
return red;
}
else if(val > 5000 && val <= 50000){
return green;
}
else{
return black;
}
};

// Serialize back eps into cccOptions
cccOptions.extensionPoints = Dashboards.objectToPropertiesArray(eps);
}


NOTE : I have tried directly in Extension points but it did not work. 

Sample output 1 : 

References : 

http://translate.google.com/translate?&ie=UTF-8&sl=&tl=en&u=http://www.redopenbi.com/group/ctools/forum/topics/colores-en-bar-chart?commentId=2400100%3AComment%3A103280&xg_source=activity&groupId=2400100%3AGroup%3A73260

OR

http://www.redopenbi.com/group/ctools/forum/topics/colores-en-bar-chart?commentId=2400100%3AComment%3A103280&xg_source=activity&groupId=2400100%3AGroup%3A73260

OR

http://forums.pentaho.com/showthread.php?150582-Bar-chart-colors-dynamically-changed-based-on-data-value-Along-with-JavaScript-vars

Hi guys,

This post teach you how to make bars as lines in pentaho CDE.

Source for this post is : http://jsfiddle.net/duarteleao/7maGD/
and http://type-exit.org/adventures-with-open-source-bi/2011/06/creating-dashboards-with-cde/

Scenario : Some end users wants visualization of grouped bars as lines where one of the bar is as bar and remaining bars as targeted lines on the same bar.


Properties have to give:
Plot2 : True
Find the remaining properties in below image: version of CDE is : 13.06 but will work in higher versions also.

NOTE: Find the image for how to give the above code as properties in Extension points of chart  component.

 Sample output of the chart on dashboard after giving the above properties.

 

Sadakar
BI developer
("Learning never exhausts the mind")

Hi Guys,

Recently I came across a situation on plotting the 0 values result set on a pie chart and failed to produce the chart with out leaving any message.

Alternatively I have shown a message saying that "All the values in the result set are zero so can not plot the visualization".

Of course, this is not a big matter to blog but I can say that this is a best practice in report designing and would like narrate for the one who wish to follow best practices.

Your end-client can easily understand when the chart is having all zero values.

Example :
Query : SELECT field1, field2, field3 FROM dummyTable
Output : 
field1      field2  field3
----------      ---------   ---------
  0              0           0

For instance assume you are showing data  on pie chart and given expressions in 3 different series lets say "series1", "series2" , "series3".

Now, if you see the preview of the report, you will be getting nothing in output as your query resultset has all values as 0



Drag and drop the "Static Text Field" over the chart from palette section and write your message(message is : All values are zero so can not plot the visualization) and Print this field when ever the values are zero.

For doing this, you have to Write similar like below expression for "Static Text Fields" PrintWhenExpression

($F{field1}==0) && ($F{field2}) && ($F{field3})

Observation or Preview.
Now select some input controls for which you will get result set  0 .. You will get the below similar like output.


Thats it... When ever your query result set is having all 0s you will be displaying message saying that can not plot visualization.


Sadakar
BI developer