HP 33s G–19, |o{≠}, |o{≤}, |o{≥}, Operation Index G–19

		Name	Keys and Description				Page	¼
x≠0?			o{≠}				13–7
			If x≠0, executes next program line;
			if x=0, skips the next program
			line.
x≤0?			o{≤}				13–7
			If x≤0, executes next program line;
			if x>0, skips next program line.
x<0?			o{<}				13–7
			If x<0, executes next program
			line;
			if x≥0, skips next program line.
x>0?			o{>}				13–7
			If x>0, executes next program
			line;
			if x≤0, skips next program line.
x≥0?			o{≥}				13–7
			If x≥0, executes next program line;
			if x<0, skips next program line.
x=0?			o{=}				13–7
			If x=0, executes next program
			line;
			if x≠0, skips next program lire:
	y		{			}	11–4	1
					¸
			Returns the mean of y values.
yˆ			Σyi ⎟ n.	¸
							11–10	1
				{ ˆ }
			Given an x–value in the
			X–register, returns the y–estimate
						ˆ
			based on the regression line: y
€			= m x + b.
		θ,r	{rRectangular to polar				4–10
y,x
			coordinates. Converts (x, y) to (r,
			θ).

Operation Index G–19