Grapher - Best free online Graph plotting software by Subhash Bose.

Grapher 5.5.6

Some key features at a glance

Can plot any number of (x,y) coordinates.
Can plot any kind of explicit functions. Lots of mathematical and logical functions available to use.
Shows coordinates on placing mouse over the graph. This helps easy analysis of graph
The graph is automatically scaled to cover whole of the graph area.
All the graph colors including background color, line color, text color, axis color etc can be easily customized.
Can show graph title and lables on X and Y axis. Title and labels can also be aligned or moves as desired by user.
Show / Hide of Grid lines, axes numbers are optional.
Some of the options can be set to 'Auto' value, so that the program can automatically assign the best possible value.
Plotted graph settings can be downloaded as a file, so that you can save the file for future use.
Also the data can be exported as .txt and .csv file. Program can also import data from .txt and .csv file in various internal format.
Plotted graph can be downloaded as portable image format .png files.
Using friendly url option you can get a unique address for your plotted graph which you can use in other forum or sites as direct link.
And lots of more options to easily use the program and get exactly what you want.

+ Graph labels can be added ox X and Y axis.
+ Graph title and labels can be moved or aligned as desired by user. User need to add required number of blank space with the text to align/move the text on the graph as desired. For more details see help on labels and title.
+ User can show the same used labels in the hover coordinate or simple X or Y as before, by disabling/enabling 'Show Labels in Hover box'.
* Improved many features and core of the Grapher.
* Fixed some bugs with hover coordintes in special cases.
* Changed the default configuration settings for grapher. Hover users can still change the setting as required like before.

What's New in v5.0.3 ?

+ Now Grapher can show coordinated when mouse hovers on the Graph, this help in easy analysis of the graph. This fucntionality is fully compatible with log-scale also.
* All the compatibility issues with different browsers are now removed. It has been successfully tested on IE v6, FireFox v2 and Operea v9
* Friendly Url function is now improved. Unlike older versions it can now work with single page load.
+ Added option to download and save the plotted Graph image. The image is in PNG format.
+ Added option to have print view for the graph separately.
+ Some changes in the user interface.
* Now the function, variables and constants are not case-sensitive.
* In previous version there was a problem in showing numbers along axis on log scale. It has been fixed now.
* Now grapher can properly analyze the region of discontinuity / undefined portion of a function. Auto range problems for functions with discontinuity has been resolved.
+ A special algorithm has been implemented for showing axes numbers or hover coordinates in log scale. Since log scale is not a linear scale, precession to a fixed decimal point is not adequate to show accurate values. With this new algorithm it will show accurate coordinates all over the graph area.
* Minor bug fixes including some javascript bugs.
- Dropped the show co-ordinate option in function plotting mode.

What's New in v4.6.9? [To use Grapher v3 click here]

What's New in v4.6.8?

+ Added option to show Grid lines along X and Y axis. The intervals and color can be set manually
* Now program can automatically determine the potions of axis to display. Unlike earlier version, axes will always be visible irrespective of the plotting range.
+ Added option to show numbers on X and Y axis with fixed intervals.
* Minor changes in the user interface.
+ Added option to export and import plotting data in co-ordinate plotting mode into .txt and .csv file format.
* Changes in .sbgf file format. So older saved file will not be working anymore. If you are having any old file, then you can email author at [email protected] for conversion to current version.

What's New in v4.2.3?

What's New in v3.5.1? [To use Grapher v3 click here]

What's New in v3.4.1?

* Can now properly plot functions having point(s) of discontinuity. In the previous version there was bug in plotting points of discontinuity. It is adviced to manually set the range of Y (instead of 'Auto') while plotting functions having points of discontinuity in the range of X.
* Bug fix for plotting in ceil() and antilog().

What's New in v3.2.7?

+ Option to plot functions (in Explicit form y=f(x) ).
+ A math library file added for user-friendly handle of log(), ln(), antilog() and constants like 'pi' and 'e'.
* Grapher Shell and core had major updates.
* Minor bug fixes.

What's New in v2.5.0? [To use Grapher v2 click here]

+ Option to show coordinates. (coordinates are properly positioned and checked that they don't go outside graph area).
+ Option to change coordinate text size.
+ Option to change global text color.
* Minor tweaks are done for efficient handling of bigger data.

What's New in v2.2.3?

* Appearance changed.
+ Option to add title on the top of the Graph.
* Can now handle both GET and POST data.
+ Option to show friendly URL (which is capable to hold whole graph data) using GET.

What's New in v2.0?

+ Option to include point(s) anywhere is the data set.
* Complete data handling structure updated to have more flexibility. [File saved under previous version will not work under current version]
+ Option to strip empty field pair.
* Minor bug fix.