How to use: Here, we can learn how to use the scientific calculator software GEOMECA (Geometric calculator)


   Simple explanation (how to use)


To draw graphs

1  We choose the form of the graph that we want to draw in the "graph" menu.

2  We input only expressions coming out in front of or behind equality (=) in the form.

   At this time, only characters such as variables to be used, function keys, number keys, point, operation keys are inputted.

   (But other figures: using commands, we can use all keys.)

3  Before we select the "Draw graphs; Perforn calculation" menu (icon button), we confirm and adjust conditions of the time when the graph is drawn.

4  Then, we select the "Draw graphs; Perforn calculation" menu (icon button). (or  we press "Enter".)


       The following items we have to adjust  was decided basically adequately.


 The conditions that we have to confirm and adjust are like the followings.

  Angle unit of trigonometric function (selecting one between Deg and Rad)

  Coordinates range where a graph will be drawn, and domain

  Space frame direction in 3-dimensional screen

  Drawing method of surfaces or curves


  Additively a graph is drawn according to the following additive conditions.

 Width, length of the drawing screen

 Region of plane coordinates

 Restricted region where a graph will be drawn within the coordinates range

 Increment of variable values of a domain or Equal-division of interval

 Color and thickness of a graph, thickness of a axis and the space frame, kind of a line, background color

 Thickness and size of a coordinates scale, To display coordinates values, To display the origin and the name of coordinates axis, shape of  and arrowhead of coordinates axis

 In a 2-dimensional screen -- section paper, to display coordinates axis, no display

 In a 3-dimensional screen -- to display a space frame and a space axis, kind of a space frame

 Subdivision of "command figures" related with figures

 Shape and color of cubic surfaces, illumination


  If last coordinates range is not changed,  this program draws a graph on it

  If last coordinates range is changed in comparision with the front,  this program erases the existing graph, and draws a graph newly.

  If you want to erase the existing graph and draw in new condition, you select  the “Erase the drawing screen”  menu (icon button).


To calculate integral, function, etc.

1  We choose the kind we want to calculate in the "calculation" menu.

2  We input expressions to calculate.

   At this time, only characters such as variables to be used, function keys, number keys, point, operation key are inputted.

3  Then, we select the "Draw graphs; Perforn calculation" menu (icon button). (or  we press "Enter".)


To calculate matrix

1 We choose matrix calculation in the "calculation" menu.

2 In the form of presented matrix calculation,

  we select the row and the column of matrix and input elements of matrix in the text box.

  (We input rows classifying by line, columns by spaces. Fractions (ex: 2/3 etc.) can also be inputted.)

3 We select the "input finish" button.

4 We select the button to calculate. ( sum and difference and product of matrix, inverse matrix and so on).


To use statistic analysis

1 We choose statistic analysis in the "calculation" menu.

2 In statistic analysis form,

   a.  We choose the input form of data in the menu.

   b.  We choose one among 1-variable sample, 2-variables sample, 3-variables sample, "analysis C use."

       In 1-variable sample, we do not use parenthesis.

       In 2-variables sample, 3-variables sample, we use the method to tie data by parenthesis like (x, y) or (x, y, z).

       In 'analysis C use,' we do not use parenthesis and input data by using space in one row like x y z.

       (It recognizes variables up to 20-variables and calculates.)

   c.  After inputting data, we select the "input finish" option.

   d.  We choose one of the next two buttons to notice whether we classify data by class-classification or  

        by apiece-classification.

   e.  If selecting class-classification, we select the "class interval when classifying class-classification" menu and

       decide class intervals by using the loaded dialogue box.

If analyzing or drawing graphs,

    f.   we select the "graphs, form" menu in the "Form" menu and choose contents to analyze or the kind of the graph to draw.

   g.  We select the "Analysis" button. If drawing a graph, we select the "graph" button.

        (A graph is drawn in the drawing screen.)

If we want to make a frequency table,

     We select the "frequency table..." menu in the "Form" menu and  choose the frequency to represent.

     And we select the "frequency table" button.

If obtaining special result,  we select the "special result" button after checking what we want to pbtain in the 'group to calculate and special result...' menu.