Real: central menu

Introduction | Select area (zoom) | Jump to other graphs and diagrams | Save menu

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Introduction:

For "Functiontype: From R to R", the following options are available (the table shows the key, text from the menu, and graph(s) to which the key applies):

Key Menu text Applies to:
ENTERSelect area (zoom) All graphs and diagrams.
<T>Change diagram type "Step-by-step iteration"
SpaceOrbit diagram for var. x "Step-by-step iteration"
BackspaceStep-by-step iter. "Orbit diagram for var. x"
SpaceOrbit diagram for var. c "Orbit diagram for var. x"
BackspaceOrbit diagram for var. x "Orbit diagram for var. c"
<S>Save menu All graphs and diagrams.
ESCAPETo parameter menu All graphs and diagrams.

You can use the <Cursor Up> and <Cursor Down> keys to move through the list of items, and <Enter> or the (hot)key (in front of the item) to select one.

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Select area (zoom):

After you press <Enter> to activate the zoom function, you will see a help menu (press <Enter> to exit). The following table shows the keys, help text and some comments:

Key Help text Description
ENTERSelect area (zoom) confirm selected area
ESCAPEAbort selection back to central menu
PGUPSmaller rectanglezoom in
PGDNLarger rectanglezoom out
0..9Skip n pixels (faster)0 = 10

There are two ways to select an area:

There's a difference between the keyboard zoom and mouse zoom, for example: the keyboard zoom preserves the aspect ratio, which the mouse zoom does not. While moving the mouse, you can monitor the coordinates corresponding to the mouse pointer position.

Keyboard

To select an area with the keyboard, press the page up and page down keys to select the size, and the cursor keys (up, down, left and right) to change the position of the rectangle. Since this is a bit slow, you can skip pixels by using the '0' - '9' keys (the '0' key can be used to skip 10 pixels). You can move the rectangle (with the cursor keys and <Page Down> key) beyond the screen boundaries. Though it will not be visible anymore, you can monitor it's position in the status bar at the bottom of the screen. Press <Enter> to confirm the new coordinates.

Mouse

To select an area with the mouse, press the left mouse button and hold it down while dragging the pointer. Releasing the mouse button does not confirm the selected area, you can still make some adjustments in position (with the cursor keys: up, down, left and right) and in size (with the <Page Up> and <Page Down> keys). Please note that, at this point, it's not possible to change the aspect ratio.

Press <Enter> to confirm the new coordinates, or <Esc> to cancel, and go back to the central menu.

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Jump to other graphs and diagrams:

This section is about switching between several graphs and diagrams, one of the things mentioned in the short description of Funiter.

Switching between diagrams

"<T> Change diagram type" opens a new window which allows you to select another diagram:

WWebdiagram
IIteration values
SStepdiagram
CCombination: web and step
ESCAPEPrevious menu

As long as you don't move the mouse while in mouse mode, all parameters remain unchanged.

Switching between graphs

Switching between graphs is easy, you can select the desired graph with the cursor keys in the central menu, or press the hotkey (spacebar to go 'forward' and backspace to go 'back'):

Spacebar (SPACE): "Step-by-step iteration" to "Orbit diagram for var. x" to "Orbit diagram for var. c".

Backspace: "Orbit diagram for var. c" to "Orbit diagram for var. x" to "Step-by-step iteration".

When you switch between graphs, a few parameters are transfered. In some cases you can select a value for such a parameter with the mouse.

The following table shows

The "Escape value" is always recalculated.

Source Key Destination Transfered value(s) Mouse position
"Step-by-step iteration" SPACE "Orbit diagram for var. x" "Value for parameter c" -
"Orbit diagram for var. x" SPACE "Orbit diagram for var. c" "1st starting value for iteration" x
"Orbit diagram for var. c" Backspace "Orbit diagram for var. x" "Value for parameter c" x
"Orbit diagram for var. x" Backspace "Step-by-step iteration" "Value for parameter c" y

You can monitor the value for the parameter in the status bar at the bottom of the screen. To confirm the selected value, press <Enter> or the left mouse button.

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Save menu:

"<S> - Save menu" opens a new menu with the following options:

PPostscript (Portrait)
LPostscript (Landscape)
XPC Paintbrush PCX
RParameters
ESCAPEPrevious menu

If you select one of these items, a file selector is opened so you can enter a filename.

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Next chapter: Complex graphs and diagrams | Previous chapter: Real graphs and diagrams | Back to: Contents