hhry / prawn-graph Goto Github PK

Hello!

Thanks for building an extension to Prawn. I'm filing this issue to let you know that we're currently working towards a stable 1.0 release of Prawn, and I want to invite you to be part of the discussion around that.

We will only have one more major release before 1.0 is shipped: it will be labeled 0.15 and it will be cut on 2014-02-16.

The functionality of the 0.15 release will be largely the same as what we ship in 1.0, so if you want to test your project against the newest Prawn code, that would be a good time to
do it. You can also get a head start by trying out what is on master now, and reporting any problems you encounter.

If your project is sufficiently up to date and is able to run on the latest Prawn code, the next step would be to take a look at our API compatibility plans, which are described in detail here:

https://groups.google.com/forum/#!topic/prawn-ruby/dbTSnlDhED0

Here's the very quick summary:

• If your project is using stable APIs and ONLY stable APIs, it will be safe for you to lock your Prawn dependency to "~> 1.0".
• If your project is using stable and extension APIs, keep an eye out for deprecation warnings, and lock your gem to
  a range of known good minor Prawn versions. (i.e. ">= 1.0", "<=1.x"). We want to eventually apply semantic versioning to our extension API as well, but we're not there yet.
• The use of experimental APIs in your extensions is not recommended unless you consider your own code to be experimental as well. Instead, work with us to figure out what it would take to get these experimental APIs stabilized or extracted.

I know this is a little bit confusing, and my hope is that in the not too distant future we'll be able to cut a Prawn 2.0 release that has much better support for downstream dependencies.

Until that time, what we lack in stability we'll try to make up in support for your project. Use the Prawn mailing list to contact us about any concerns or breakage, help us work on API stabilization, and let us know when you need extension points to support your project.

Thanks!
-greg

Has anyone implemented a stacked bar chart?

Hi,

When do you expect to have Pie Chart support? This is something I am really looking forward to.

Thanks,
Jay

Using the default theme lets you have no more than 5 series because only five colours are assigned in the theme. This should be made clear in the documentation - if you want to have more than five series you need to define the colours in a theme.

This problem is compounded by the fact that when you try to have more series than colours defined the error message is unknown color space: '' As a new user I installed the gem, didn't touch themes or change any defaults, tried to plot a graph with 6 series and got this error. Without context this was very confusing.

I think the graph function should check if the number of colours in the theme is not enough for the number of series and, if not, raise an error with a message like this: You are trying to plot a graph with #{series_count} series but only #{colour_count} colours in the theme.

Please add Timeline Graph as https://developers.google.com/chart/interactive/docs/gallery/timeline#a-simple-example

Or GANTT Chart as https://developers.google.com/chart/interactive/docs/gallery/ganttchart#overview

Thanks for your job!!

Are there basic graph functionalities like gridlines, resizing, removing the DOTS in a line chart etc? I cannot see them in the documentation so I doubt if such features are available. I am used to using DYGRAPHS charting library and would like to know if some of similar customization features are available. I really need gridlines and some basic functionalities for modifying how the graph looks. Please let me know if it is possbile. I appreciate the developer's effort though. Thanks!

I am generating a PDF using gem prawn. I have also added one bar graph but I want to rotate xlabels by 90 degree. Is there some way to do it using prawn-graph?

And how to have uniform yaxis_labels? Right now it just puts up some numbers based on the data points you have provided.

The spacing between bars and their position on the grid is rather sloppy and tends to render un-usable graphs for small record-sets.

Hi, I was wondering if this library supports bar charts like the following:

Thanks!

README.md has this under Removed Features

Unlike previous versions of prawn-graph, this version does not at this time include a theme api or the ability to change the colors used to render the graph.

Which is then contradicted further down the page under Theming

You can pass an instnace [sic] of Prawn::Graph::Theme using the :theme option to the graph and chart methods.

It looks like one of these statements overrides the other, but I can't see which is still valid.

my Y-axis values are 6 digit numbers but graph is displaying max 4 digits.
Also Values are overriding in Y-axis.

Is there any way to fix this ?
I am using
rails 6.1.6
ruby 2.6.7
prawn-graph 1.0.6

Using prawn with prawn-graph,

pdf.graph(series....
pdf.move_down(4)
pdf.graph(series2...

Creates two graphs that overlay one another...the titles and labels are printed on top of each other. Expecting to see two separate graphs here.

It seems like the Y-axis doesn't seem to extend for negative y-values. The graph seems to be perfect however, to enhance the readability, I'd like to visibly extend the y axis below the origin. Is it possible as of now? I have attached a demo in the file below:
email_monitor.pdf

Hi, first of all thanks for making this gem!
I tried out your example:

require 'prawn-graph'

  series = []
  series << Prawn::Graph::Series.new([4,9,3,2,1,6,2,8,2,3,4,9,2],  title: "A label for a series", type: :bar)
  series << Prawn::Graph::Series.new([5,4,3,2,7,9,2,8,7,5,4,9,2],  title: "Another label", type: :line, mark_average: true, mark_minimum: true)
  series << Prawn::Graph::Series.new([1,2,3,4,5,9,6,4,5,6,3,2,11], title: "Yet another label", type: :bar)
  series << Prawn::Graph::Series.new([1,2,3,4,5,12,6,4,5,6,3,2,9].shuffle, title: "One final label", type: :line, mark_average: true, mark_maximum: true)

  xaxis_labels = ['0900', '1000', '1100', '1200', '1300', '1400', '1500', '1600', '1700', '1800', '1900', '2000', '2100']

  Prawn::Document.generate('test.pdf') do
    graph series, width: 500, height: 200, title: "A Title for the chart", at: [10,700], xaxis_labels: xaxis_labels
  end

When displaying it, it shows the y-axis with the values 12,9,12,9,12,9,11,12 instead of the correct values. Is this a dependency issue, any other way to set the Y axis manually?

Thanks,
Regards,
Dirk

This new Canvas will represent the area of a document which the chart / graph will be rendered - including any titles, labels, axes, grids, etc, etc - it will essentially be an updated version of the old Prawn::Graph::Legacy::Grid, but with support for multiple series and a more logical (and testable) interface for orchestrating the rendering of each series.

This will make use of the sizing code introduced from prawn-svg since it already does a great job of making sure SVG objects can be scaled to fit in the available space.

The prawn_shapes gem already has most of what we need to draw pie charts in it. Rather than re-inventing the wheel, let's depend on the library and use it to provide support for drawing pie charts on our graph canvas.

Array#nitems is defunct as of Ruby 1.9. Using it in prawn/graph/base.rb (line 213) and prawn/graph/theme.rb (line 103) prevents basic functionality under Ruby 1.9. Array#count can be used instead and works with Ruby 1.8.7.

On a per-series basis, make the option to mark the minimum and maximum value available, and also mark the series.

It should be possible to specify colours for series in prawn graph in a similar way to how the old "themes" support worked.

The default should remain the current greyscale colours, but we should be able to specify the colours for:

• Series
• Axis Lines
• Title
• Legend Text
• Average Line
• Max indicator
• Min Indicator

I am trying to build a line chart, but I noticed the first value is starting below the x-axis line. I am digging into the code now but would want to open an issue as well.

Example:

series = []
series << Prawn::Graph::Series.new([0,1.47,3.86,6.43,14.65,20.6,20.86,32.71,32.75,42.39,42.46,61.24,67.97,72.68,73.63,74.66,100.84,104.79,107.1,163.33,163.4,164.28,165.12,168.83,171.07,177.95,257.09,260.65,263.99,323.11,342.15,349.9,469.93,472.72,485.84,495.87,540.92,541.37,543,552.52,555.18,556.17,556.5,561.86,563.28,573.98,716.51,716.51,747.39,754.75,758.15,761.65,770.59,826.77,829.64,830.83,846.15,869.96,877.63,879.64,890.91,898.77,899.42,949,953.43,966.25,966.98,1070.1,1103.1,1105.75,1184.08,1193.34,1197.4,1206.86,1217.94,1244.72,1246.85,1256.11,1294.97,1298.91,1320.07,1591.88,1594.09,1601.54,1615.34,1625.54,1643.13,1649.04,1667.93,1676.61,1697.22,1712.25,1744.68,1751.56,1798.26,1888.64,1901.28,1908.82,1994.79,2021.5,2033.58,2078.22,2079.55,2093.98,2097.76], type: :bar)
series << Prawn::Graph::Series.new([0,1.47,3.86,6.43,14.65,20.6,20.86,32.71,32.75,42.39,42.46,61.24,67.97,72.68,73.63,74.66,100.84,104.79,107.1,163.33,163.4,164.28,165.12,168.83,171.07,177.95,257.09,260.65,263.99,323.11,342.15,349.9,469.93,472.72,485.84,495.87,540.92,541.37,543,552.52,555.18,556.17,556.5,561.86,563.28,573.98,716.51,716.51,747.39,754.75,758.15,761.65,770.59,826.77,829.64,830.83,846.15,869.96,877.63,879.64,890.91,898.77,899.42,949,953.43,966.25,966.98,1070.1,1103.1,1105.75,1184.08,1193.34,1197.4,1206.86,1217.94,1244.72,1246.85,1256.11,1294.97,1298.91,1320.07,1591.88,1594.09,1601.54,1615.34,1625.54,1643.13,1649.04,1667.93,1676.61,1697.22,1712.25,1744.68,1751.56,1798.26,1888.64,1901.28,1908.82,1994.79,2021.5,2033.58,2078.22,2079.55,2093.98,2097.76], type: :line)

graph series, { width: bounds.width, height: 200, title: "Historical Profit/Loss ARG", :series_key => false, at: [0,bounds.height] }

For the example, I used both a line and bar of the same values to show that it is incorrectly rendering both line and bar charts.

This example produces this output: