Best graphing software for free download

Graphing, curve fitting and calculating software. Graphs Cartesian, polar and parametric functions, graphs of tables, implicit functions and inequalities. Calculus features: regression analysis, derivatives, tangents, normals and more.
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Grapholic is an extremely useful tool for maximizing data visualization. You can convert your raw data into meaningful Graphs in just a few clicks. The simple steps you follow are Import, plot, modify and export to get your data in graphical form.
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The PHP graphing scripts provide a very easy way to embed dynamically generated graphs and charts into PHP applications and HTML web pages.Very easy to use and add professional quality graphing to web pages / applications in minutes. Try for free.
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FlyCharts is a set of Macromedia Flash (SWF) files which creates good-looking charts. FlyCharts doesn’t need any installation, works with any scripting language, can be used in any browser, is scalable & flexible, size of output file is really
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ecGraph is a powerful graphing ActiveX control that you can drop into your Visual Basic programs to create graphs in a huge range of styles. Great for scientific or technical graphs. You can get a graph up and running with just a few lines of code, and can manipulate the graph layout at runtime from your programs.
* Easily create scientific or engineering graphs within your VB applications
* Multiple graphs per page
* Click and drag to move or resize graphs on the page
* Zoom and scroll areas of the graphs
* Multiple x- and y-axes per graph
* Log or linear scales on axes
* Plot data points, bars, text
* Plot continuous math functions like y = sin(x)*exp(-x/10)
* Plot data points against math functions, with vertical or horizontal optional error bars
* Configurable grid lines, tick marks, borders, backgrounds
* Legend tables, reverse axes, show/hide labels, transparent backgrounds
* Demo projects supplied to show how all the features work
* Project1 - simple viewer to load and display the demo graphs and the VB code used to generate them.
* Project 2 - comprehensive graph editing program, loads the demo graphs and lets you edit them on screen
* Hundreds of other features
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UltimaCalc Professional is a highly functional graphing math toolbox with a compact and intuitive design offering the ultimate balance of power and convenience.
Its algebra module lets you perform manipulations and simplifications on basic and complex algebraic expressions. UltimaCalc lets you do calculus: differentiate an expression, or find its integral and ask how this was found.
You can factorise polynomials, multiply and divide one polynomial by another, find the GCD of two polynomials. Expand and contract trig expressions. Calculate Taylor series, define your own functions, and calculate exact results (try evaluating the factorial of 1000).
Other modules let you fit lines or curves to your data (5 methods), find the values of variables that minimise an expression, plot functions (including parametric plots), find the roots of polynomials, solve simultaneous linear and non-linear equations, calculate standard deviations and other statistics, solve triangles, create graphs and charts.
UltimaCalc is designed for usability. The main window is a calculator with an amazing 38 digits of precision. You can make the window transparent when inactive so you can read a document underneath it. You can hide the title bar. Keep the calculator open all the time, on top of other windows, always ready for use, or use hot keys to instantly hide and restore it.
Define your own functions, use them just like the built-in functions, and build up a library of them. Define your own constants, too.
Choose how many digits to display, and show them grouped in sets of three or five digits. Full support for hexadecimal numbers and complex numbers.
Log all calculations to a text file, and copy and paste calculations to other applications as plain text.
Contains a handy reference table of more than 300 constants, including atomic weights.
Comprehensive help (with index) is provided for all features.
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DPlot is a general purpose graphing program designed for scientists, engineers, and students. It features multiple scaling types, including linear, logarithmic, and probability scales, as well as several special purpose graphs: tripartite grids (shock spectra), grain size distribution plots, polar plots, contour plots of 3D data, and box-and-whisker plots and dot graphs of one or more 1D samples. Manipulation functions include FFT, filtering, and smoothing. Data can be input via file, copied from the clipboard, generated by an equation within DPlot, sent to DPlot from Excel via the supplied Add-In, or sent to DPlot via dynamic data exchange. Source code for example Visual Basic and C demo driver programs are included.
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UltimaCalc is a scientific and mathematical calculator designed to occupy minimum screen area, making it immediately available for use. UltimaCalc can stay on top of other windows. Type a calculation as plain text, evaluate it, maybe edit it and re-calculate. Has a comprehensive context-sensitive help system.
Calculates to 38 digit precision. The display can be limited to just 8, 12 or 16 digits, and digits grouped for readability. Two 'scientific' view modes show numbers always in exponent format. The 'engineering' mode uses suffixes such as k (kilo) and M (mega). View results in hexadecimal and as ratios.
Functions available include logarithms to base 2, exp, two-argument inverse tangent; cube root (even of negative numbers); factorials, combinations, permutations, powers, modulus, GCD. Also floor and ceiling functions, absolute value, min, max, extract the fractional part of a number. Calculate the slope of a line given its end points. Even calculate definite integrals.
Define your own functions and constants, saved as a plain text file.
Find the date of Easter. Calculate future or past dates. Julian day numbers.
Calculate the mean, median and standard deviation of a sample and its population.
Create bar, line, pie charts. Add title, subtitle, labels. Adjust the layout, choose colours and hatching, save as an image.
Regression: Plot a scatter chart and regression line. Fit a polynomial to data. Analyse the effects of multiple variables on data. Absolute deviation fit minimises the effects of outlying values.
Plot functions: Specify starting and ending conditions and how variables change. Choose axis locations. Combine multiple plots. Save as an image.
Solve triangles: Given one side and two other facts, calculate the unknowns. View the result graphically.
Solve Simultaneous Linear Equations, and do Navigational calculations.
Log calculations to a text file, or copy and paste into other programs. Save specialised calculations with notes in data files.
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