DADiSP

DADiSP is designed to perform technical data analysis in a spreadsheet like environment. However, unlike a typical business spreadsheet that operates on a table of cells each of which contain single scalar values, a DADiSP Worksheet consists of multiple interrelated windows where each window contains an entire series or multi-column matrix. A window not only stores the data, but also displays the data in several interactive forms, including 2D graphs, XYZ plots, 3D surfaces, images and numeric tables. Like a traditional spreadsheet, the windows are linked such that a change to the data in one window automatically updates all dependent windows both numerically and graphically.{{cite web|title=DADiSP Makes Complex Data Analysis Faster and Easier |url=http://www.dadisp.com/aboutdad.htm |publisher=DSP Development Corp |access-date=March 3, 2014}}{{cite web|title=DADiSP 2002 Escape from the cell block |url=http://www.scientific-computing.com/scwjulaug03review_dadisp.html|publisher=Scientific Computing World|access-date=March 3, 2014}} Users manipulate data primarily through windows. A DADiSP window is normally referred to by the letter "W" followed by a window number, as in "W1". For example, the formula W1: 1..3 assigns the series values {1, 2, 3} to "W1". The formula W2: W1*W1 sets a second window to compute the square of each value in "W1" such that "W2" will contain the series {1, 4, 9}. If the values of "W1" change to {3, 5, 2, 4}, the values of "W2" automatically update to {9, 25, 4, 16}.

DADiSP includes a series based programming language called SPL (Series Processing Language){{cite web|title=DADiSP SPL vs. MATLAB |url=http://www.dadisp.com/matlab.htm |publisher=DSP Development Corp |access-date=March 3, 2014}} used to implement custom algorithms. SPL has a C/C++ like syntax and is incrementally compiled into intermediate bytecode, which is executed by a virtual machine. SPL supports both standard variables assigned with = and "hot" variables assigned with :=. For example, the statement A = 1..3 assigns the series {1, 2, 3} to the standard variable "A". The square of the values can be assigned with B = A * A. Variable "B" contains the series {1, 4, 9}. If "A" changes, "B" does not change because "B" preserves the values as assigned without regard to the future state of "A". However, the statement A := 1..3 creates a "hot" variable. A hot variable is analogous to a window, except hot variables do not display their data. The assignment B := A * A computes the square of the values of "A" as before, but now if "A" changes, "B" automatically updates. Setting A = {3, 5, 2, 4} causes "B" to automatically update with {9, 25, 4, 16}.

DADiSP was originally developed in the early 1980s, as part of a research project at MIT to explore the aerodynamics of Formula One racing cars. The original goal of the project was to enable researchers to quickly explore data analysis algorithms without the need for traditional programming.

• DADiSP 6.7 B02,{{cite web|title=DADiSP 6.7 B02 Release Notes |url=http://www.dadisp.com/sls67quick.htm |publisher=DSP Development Corp |access-date=January 18, 2017}} Jan 2017
• DADiSP 6.7 B01,{{cite web|title=DADiSP 6.7 B01 Release Notes |url=http://www.dadisp.com/sls67b01.htm |publisher=DSP Development Corp |access-date=October 30, 2015 }} Oct 2015
• DADiSP 6.5 B05,{{cite web|title=DADiSP 6.5 B05 Release Notes |url=http://www.dadisp.com/sls65quick.htm |publisher=DSP Development Corp |access-date=March 3, 2014 }} Dec 2012
• DADiSP 6.5,{{cite web|title=DADiSP 6.5 |url=http://www.scientific-computing.com/products/product_details.php?product_id=844|publisher=Scientific Computing World|access-date=June 1, 2010}} May 2010
• DADiSP 6.0, Sep 2002
• DADiSP 5.0, Oct 2000
• DADiSP 4.1, Dec 1997
• DADiSP 4.0, Jul 1995
• DADiSP 3.01, Feb 1993
• DADiSP 2.0,{{cite journal | doi = 10.1111/j.0033-0124.1992.00103.x | title = DADiSP 2.0 | volume=44 | year=1992 | journal=The Professional Geographer | pages=103–108}} Feb 1992
• DADiSP 1.05, May 1989
• DADiSP 1.03, Apr 1987

• List of numerical-analysis software
• Comparison of numerical-analysis software

{{reflist}}

• Allen Brown, Zhang Jun: First Course In Digital Signal Processing Using DADiSP, Abramis, {{ISBN|9781845495022}}
• Charles Stephen Lessard: Signal Processing of Random Physiological Signals (Google eBook), Morgan & Claypool Publishers

• [http://www.dadisp.com DSP Development Corporation (DADiSP vendor)]
• [http://www.dadisp.com/webhelp/dsphelp.htm DADiSP Online Help]
• [http://www.dadisp.com/flashdemos1.htm DADiSP Tutorials]
• [http://www.dadisp.com/files/getstart.pdf Getting Started with DADiSP]
• [https://web.archive.org/web/20120303063224/http://civil.eng.buffalo.edu/CIE616/3-HANDOUTS/DADISP/101108-Introduction%20to%20Dadisp.pdf Introduction to DADiSP]

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{{Numerical analysis software}}

Category:Data analysis software

Category:Data-centric programming languages

Category:Data mining and machine learning software

Category:Numerical linear algebra

Category:Data and information visualization software

Category:Statistical programming languages

Category:C (programming language) software

Category:Software modeling language