On 2/19/2010 4:42:58 PM, Mona Zeftel wrote:
>In Mathcad Prime 1.0, you can
>have units on plots, so the
>question arose
>about showing units on the
>markers. We want to show them
>but what if two
>or more traces have different
>unit scaling? This would be a
>conflict if
>you have a marker where two or
>more traces intersect.
I think we need to back up a bit here and establish what it is one actually plots on a graph. The ONLY thing you can plot on a graph is a number. You cannot plot, for example, 5 tonnes as a point. That is why the quantity must always be divided by an appropriate unit before plotting. I can plot 5*tonnes/tonnes, which shows as a value of 5, or 5*tonnes/kg, which shows as a value of 5000, but I can't plot 5*tonnes or 5000*kg. Incidentally, that's why the strictly correct way of labeling an axis is quantity/units, not quantity (units), and you should allow people to use this form of labeling.
>What is the point below for a
>marker, 4.9? 4.9 kg or 4.9 m?
The point is at 4.9. Like anything else on a graph, a point can only have purely numerical coordinates. Your apparent conflict occurs because, as Tom has already pointed out, you are asking a nonsensical question to begin with. You might as well ask "how many 1kg masses do I need to make a 3 meter length?". I understand what you want, but the reason you will never be able to come up with a satisfactory way to do it is because there is no way to do it.
Richard
