#### 3.10 The simple constant maths window

This window allows you to add, subtract, divide and multiply a spectrum by a constant. To use it just select a spectrum in the Global list of spectra: and enter the value you want in the Constant: entry area. Now select the operation you want to apply. A new spectrum called:

• Sum: (short name of spectrum) + (<constant>)
• Diff: (short name of spectrum) - (<constant>)
• Div: (short name of spectrum)$÷$ (<constant>)
• Mult: (short name of spectrum) x (<constant>)

is created on the global list.

Accelerator keys

• Control-d Add the constant to the selected spectrum.
• Control-s Subtract the constant from the selected spectrum.
• Control-m Multiply the selected spectrum by the constant.
• Control-i Divide the selected spectrum by the constant.
• Control-w Close the window.
• F1 Display help on SPLAT-VO.
• Shift-F1 Display help on window.