Recent changes to Home

Home modified by Alfred Steffens Jr

Alfred Steffens Jr — Tue, 09 Sep 2014 11:56:46 -0000

Home modified by Alfred Steffens Jr

Alfred Steffens Jr — Tue, 09 Sep 2014 11:55:56 -0000

--- v8
+++ v9
@@ -1,18 +1,17 @@
-* * *
-
-HMD for Computer Modeling
-==========================

 * * *

-### Overview ###
+[TOC]

+* * *
+
+#### Overview

 The HMD software program is first a basic mathematics interactive *workspace* and *script interpreter*.  As such, it is a mini programming language with syntax similar to the C language or like Scilab or Matlab. The advantage of an interactive workspace is that variables can be created and used in computations.  Script files can be loaded and executed from the shell command line.

 * * *

-### Basic Syntax ###
+#### Basic Syntax

 Code statements are in the form of an equation,

@@ -53,7 +52,7 @@

 * * *

-### Redirection ###
+#### Redirection

 There are currently two kinds of redirection in an HMD script:  the if / else construct and the while loop.  An example of an if statement would be

@@ -71,3 +70,18 @@
         x = x + 1;
     }

+* * *
+
+#### Functions
+
+Function are defined with the function keyword, followed by the name, followed by a list of parameters enclosed in curly brackets, followed by an opening curly bracket, all on one line:
+
+    :::C
+    function My_Function { int count, double value } {
+        int cnt2;
+
+        // some code
+
+        return 3;
+    }
+

Home modified by Alfred Steffens Jr

Alfred Steffens Jr — Sun, 07 Sep 2014 13:10:37 -0000

--- v7
+++ v8
@@ -50,3 +50,24 @@
     newMagnitude = 5.0 * dMagnitude;

 produces a new array which is dMagnitude multiplied by 5.
+
+* * *
+
+### Redirection ###
+
+There are currently two kinds of redirection in an HMD script:  the if / else construct and the while loop.  An example of an if statement would be
+
+    :::C
+    if (x < 3) {
+        //    some code
+    }
+
+Notice that the code to be executed must be enclosed in curly brackets and that the opening bracket must be on the same line with the conditional test.  Similarly, for a while loop,
+
+    :::C
+    x = 0;
+    while (x < 3) {
+        //    some code
+        x = x + 1;
+    }
+

Home modified by Alfred Steffens Jr

Alfred Steffens Jr — Fri, 05 Sep 2014 11:42:46 -0000

--- v6
+++ v7
@@ -39,3 +39,14 @@

 If a variable is created on-the-fly it will automatically be of type double.  In computations, the result will end up being of type double or doublecomplex, so the other data types have limited use.  For example, the int and long types are useful for array indices or counters.

+Access to arrays is performed like in C, with square brackets,
+
+    :::C
+    myvar = dMagnitude[3];
+
+Calculations involving arrays are performed on every element of the array, like in the XxxLab languages,
+
+    :::C
+    newMagnitude = 5.0 * dMagnitude;
+
+produces a new array which is dMagnitude multiplied by 5.

Home modified by Alfred Steffens Jr

Alfred Steffens Jr — Thu, 04 Sep 2014 11:49:00 -0000

--- v5
+++ v6
@@ -19,8 +19,23 @@
     :::C
     x = 1;

-with standard C/Matlab arithmetic operations.  For example,
+with standard C or XxxLab arithmetic operations.  For example,

     :::C
     y = 2.5 * x / (x + 1);

+Variables can be single numbers, that is, scalars, or variables can be arrays.
+
+    :::C
+    x = 2;           // a scalar
+    x = [1, 2, 3]    // an array
+    cx = <1 % 3>;    // a complex number, 1 + 3i
+
+Variables can be defined "on the fly," which is done in most scripting languages, or they may be declared with a certain type, like in C:
+
+    :::C
+    int iCount;
+    double dMagnitude[10];
+
+If a variable is created on-the-fly it will automatically be of type double.  In computations, the result will end up being of type double or doublecomplex, so the other data types have limited use.  For example, the int and long types are useful for array indices or counters.
+

Home modified by Alfred Steffens Jr

Alfred Steffens Jr — Wed, 03 Sep 2014 12:09:26 -0000

--- v4
+++ v5
@@ -5,7 +5,22 @@

 * * *

-Overview
---------
+### Overview ###
+

 The HMD software program is first a basic mathematics interactive *workspace* and *script interpreter*.  As such, it is a mini programming language with syntax similar to the C language or like Scilab or Matlab. The advantage of an interactive workspace is that variables can be created and used in computations.  Script files can be loaded and executed from the shell command line.
+
+* * *
+
+### Basic Syntax ###
+
+Code statements are in the form of an equation,
+
+    :::C
+    x = 1;
+
+with standard C/Matlab arithmetic operations.  For example,
+
+    :::C
+    y = 2.5 * x / (x + 1);
+

Home modified by Alfred Steffens Jr

Alfred Steffens Jr — Wed, 03 Sep 2014 11:55:26 -0000

--- v3
+++ v4
@@ -5,14 +5,7 @@

 * * *

-Table of Contents
-------------------
-
-# Overview
-# Programming Syntax
-# Finite Elements
-
-* * *
-
 Overview
 --------
+
+The HMD software program is first a basic mathematics interactive *workspace* and *script interpreter*.  As such, it is a mini programming language with syntax similar to the C language or like Scilab or Matlab. The advantage of an interactive workspace is that variables can be created and used in computations.  Script files can be loaded and executed from the shell command line.

Home modified by Alfred Steffens Jr

Alfred Steffens Jr — Wed, 03 Sep 2014 11:47:37 -0000

--- v2
+++ v3
@@ -0,0 +1,18 @@
+* * *
+
+HMD for Computer Modeling
+==========================
+
+* * *
+
+Table of Contents
+------------------
+
+# Overview
+# Programming Syntax
+# Finite Elements
+
+* * *
+
+Overview
+--------

Home modified by Alfred Steffens Jr

Alfred Steffens Jr — Wed, 03 Sep 2014 11:44:02 -0000

--- v1
+++ v2
@@ -1,8 +0,0 @@
-Welcome to your wiki!
-
-This is the default page, edit it as you see fit. To add a new page simply reference it within brackets, e.g.: [SamplePage].
-
-The wiki uses [Markdown](/p/heldenmathmodeler/wiki/markdown_syntax/) syntax.
-
-[[members limit=20]]
-[[download_button]]

Discussion for Home page

Alfred Steffens Jr — Mon, 01 Sep 2014 14:02:06 -0000

HMD for Computer Modeling

Overview

Programming Syntax

Finite Elements

Overview

The HMD software program is first a basic mathematics interactive workspace and script interpreter. As such, it is a mini programming language with syntax similar to the C language or like Scilab or Matlab. The advantage of an interactive workspace is that variables can be created and used in computations. Script files can be loaded and executed from the shell command line.