HP49G / HP49G+ Tutorials
Part Five - Tips and Tricks
Here is a small selection of useful hints that make life easier
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Shortcut Keys
While at the Stack...
In RPN mode, you must hold blue shift to enter a function to plot, graph etc.
The reason for this is that it allows a handy shortcut. In RPN Mode,
Custom Menu
You can make your own custom menus that contain frequently used commands. To do so, Make a list containing the commands you want to use, eg {SIMPLIFY LAP ILAP}, put it on the stack, then type MENU.
Now you have a custom menu. To view it, Left Shift MODE (MODE has CUSTOM written above it). The screenshot below shows the Custom menu on my HP49G+.
Entering Polynomials
Entering Polynomials in RPN mode is a pain, and other methods aren't much better. This program will allow you to easily generate polynomials.
<< PEVAL EXPAND >> .
To use it, put the coefficients in a vector (Between []'s), on the stack, then the name of a variable, and then run the program. EG To generate 5*x^3 + 6*x^2 + 7x + 9, Put
[5 6 7 9] on the stack, then type 'X'. Then run the program. I have saved this as 'MkPol' in the screenshot above (Make Polynomial).
Quick'n'Simple Programs
Personally, I hate the default way of entering i or Pi. Suppose you wish to enter 3Pi. You must type [3] [shift] [Pi] [X]. The same applies with i. I use 2 simple programs to correct this.
xi: <<i *>>
xPi: <<Pi *>>
I have these in the Custom menu shown above. Now to enter 3Pi, you just type [3] [xPi].
Customise the Keyboard
Here's a really simple example showing how to customise the keyboard.
I use the Equation Writer a lot. However on the 49G+ the EQW key is shifted - this is annoying. There is a key marked 'SYMB' which I never use, so
lets redefine SYMB to start the equation writer.1) Firstly, we must find out the keycode for 'EQW', which is right-shift the tick key. To do this, put '0' on the stack. Then type 'WAIT' w/o the quotes then ENTER. Now press right shift then tick. Notice 43.3 appears on the stack? That's the code for the EQW key.
2) Next we must write a program that hits 'EQW' for us. It's easy… <<43.3 KEYEVAL>>. Save this as RnEQW. Run it to see that it does in fact start the equation writer.
3) Next we must find the keycode for the SYMB key. Do this as per 1 to get 44.1
4) Finally we must redefine key 44.1 to run 'RnEQW'. Create this list EXACTLY {'RnEQW' 44.1} and press ENTER. Then type STOKEYS [Enter].
Hang on, it doesn't work!
The keyboard must be in USER mode for your customizations to take effect. To lock USER mode, type left-shift alpha TWICE. 'USR' should appear on the LCD.
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