Setting the y-axis range in d3.js and nvd3.js: A complete guide

I'm attempting to define the y-axis range of the chart to be between 1 and 100.

After reviewing the API documentation, I came across a potential solution involving axis.tickValues which can be found here: https://github.com/mbostock/d3/wiki/SVG-Axes#wiki-tickValues

Unfortunately, trying this option did not yield the desired outcome. While exploring the documentation further on the same page under axis.tickSize, I noticed the following statement:

The end ticks are determined by the associated scale's domain extent, and are part of the generated path domain rather than a tick line

It appears that setting the minimum and maximum values of the range cannot be achieved through the Axis option.

Do you have any suggestions for where I could specify the range?

javascriptd3.jsnvd3.js

Answer №1

Managed to solve the issue.

By adding .forceY([0,100]) during the chart creation process, the axis is enforced to adhere to the specified range in the array.

I referenced an example from this link:

Simply attaching .forceY([0,100]) to the chart variable does the trick.

Answer №2

If you think about it, this feature basically adds the values within the array to your 'y' domain instead of setting it as '[0,100]'. For example, if you specify the domain as '[0,100]' but your data's domain ranges from '-10' to '110', then the actual domain will be '[-10,110]'.

However, if you want to keep the domain as '[0,100]' regardless of your data range, you can utilize 'chart.yDomain([0,100])'. But usually, you'd want the domain to encompass your data naturally, which is why I suggest using 'chart.forceY' over 'chart.yDomain'. An common example would be using 'forceY([0])' to ensure that 0 is always included in the domain.

I hope this clarifies the functionality for you. Additionally, arboc7, this explanation should clarify why it cannot reduce the range below that of the dataset.

Answer №3

When dealing with stacked area charts, the function .forceY([0,100]) is ineffective. A better alternative is to utilize .yDomain([0,100])

Answer №4

When it comes to defining the y-domain (the numerical range to be shown) for stacked area charts, I've found this method effective:

nv.models.stackedAreaChart()
  .x(function(d) {...})
  .y(function(d) {...})
  .yDomain([0, maxY])
...

Answer №5

Encountering a comparable problem, I managed to overcome it by specifically setting the domain in the yScale of the yAxis as demonstrated below:

let yScale = d3.scaleLinear()
                     .domain([0,200])
                     .range([300, 0]);
let yAxis = d3.axisLeft()
                  .scale(yScale);

Answer №6

My approach has been the following:

chart.adjustYAxis([minValue, maxValue]);

I need to dynamically calculate the minimum and maximum values from an array in order to adjust the axis points when a filter is applied. To achieve this, I have custom handling for click events on the filter like so:

$('g.nv-series').click(function() {
   // Calculate minValue and maxValue based on the data array                    
   chart.adjustYAxis([minValue, maxValue]);                        
});

This ensures that the graph adjusts each time a filter is applied.

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