Plot Quick Users Guide
Plot ZX is an advanced application for graphing and analyzing mathematical functions, designed for students, teachers, and researchers in scientific fields.
Intuitive to use yet powerful in its capabilities, PLOT transforms the way mathematics is explored: it doesn’t just draw functions — it studies them in depth, providing real-time numerical and geometric analysis tools:
- X (uppercase) is the variable of the math function Y=F(X)
It can be written by hand with the keyboard in the text field "f(X)=" or by using the blue "X" key
- Use the f(X)= text field to manually type the mathematical function f(X)
ex.
(2*X*X+1)/(X-1)
and press PLOT to show the graph.
- The mathematical function f(X) can also be written automatically using the blue function buttons at the bottom (X, SQRT, POW, ABS, COS, ACOS, COSH, ACOSH, SIN, ASIN, SINH, ASINH, TAN, ATAN, TANH, ATANH, LN, LOG, EXP, etc...).
- The functions can be chained one inside the other by replacing the variable X with the second function:
ex.
cos ( X ) = FUNCTION(X, 'cos')
cos( sin ( X ) + 1 ) = FUNCTION(FUNCTION(X, 'sin')+1, 'cos')
- Constants:
PI = pi = 3.14
E = Napier's number = 2.71
ex.
cos( 3.14 ) = FUNCTION(PI, 'cos')
sin ( 2.71 ) = FUNCTION(E, 'sin')
- To set the domain of the function, press on the numeric value of X MIN and X MAX (at the top, yellow), in picture D = [-15 , +12]
- To view the details of the graph of the function f(X):
use PAN (UP, DOWN, LEFT; RIGHT) to move around the graph
use ZOOM (+,-) to zoom in and out (use the "ALL, X, Y" control to select full ZOOM or just zoom the X or Y axis)
- After plotting the function using the blue PLOT button, you can use the CURSOR to analyze Y=f(X) point by point. The analysis and calculation data will be displayed in real time in red at the bottom. To view the data in more detail, press the CALC button in the top left. To move the cursor, use the red < and > buttons in the lower left and right (in the function diagram pane).
- For each X=xx and Y=yy (coordinates of the point of Y=f(X) highlighted by the CURSOR) will be shown:
the angular coefficient of the line (calculated at the point (X,Y))
the angle of the tangent line at that point with respect to the X axis
- Within the chosen DOMAIN will be shown:
the MINIMUM and MAXIMUM values of the function f(X)
the numerical value of the integral of the function f(X)
Press the blue CALC button in the top left for more numerical details. A new numerical analysis window will open.
- Press the DEL button to delete the diagram of the function and the function f(X)= written in the text field. The PAN and ZOOM values will be reset.
- Press the CLEAR button to delete only the graph of f(X). The PAN and ZOOM values will be reset. This button is useful for editing the function already written in the f(X)= text field (since it will not be deleted) and redrawing it (once modified) by pressing the PLOT button again. Press CLEAR and PLOT in sequence to reset only the PAN and ZOOM values.
- When typing the function in the f(X)= text field don't leave any blank spaces. If the X-axis turns green when you press the PLOT button, you've made a typing error.
