hp40g+.book Page 19 Friday, December 9, 2005 1:03 AM
Press to clear the value of the highlighted variable.
Press to change the name of the highlighted variable.
Press to define a new variable (which you do by specifying an object and a name for the object.
SYMB key | Pressing the | key in |
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| the Equation Writer gives |
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| you access to CAS history. |
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| As in the HOME screen |
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| history, the calculations are |
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| written on the left and the | ||
| results are written on the right. Using the arrow keys, you | ||
| can scroll through the history. | ||
| Press | to copy the highlighted entry in history to the | |
clipboard in order to paste it in the Equation Writer. Press | |
or | to replace the current selection in |
Equation Writer with the highlighted entry in CAS history. | |
Press | to leave CAS history without changing it in |
any way. |
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SHIFT SYMB or | While you are working in the |
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SHIFT HOME keys | Equation Writer, pressing |
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| or |
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| opens CAS MODES |
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| screen. The various CAS |
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| modes are described in | ||
| “CAS modes” on page | ||
SHIFT , key | Pressing | followed by the comma key undoes (that | |
| is, cancels) your last operation. | ||
PLOT key | Pressing | in the |
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| Equation Writer displays a |
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| menu of plot types. You can |
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| choose to graph a function, |
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| a parametric curve, or a |
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| polar curve. |
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| Depending on what you |
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| choose, the highlighted |
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| expression is copied into the |
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| appropriate aplet, to the |
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| destination that you specify. |
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Equation Writer |
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