how to draw line on xy graph, i have a point but no line

[nht8040]

hey,

i want to make a PV-diagram of a sterling engine but when i do this with a XY graph is only show a point that moves, not a line.

when i go to the block diagram en set the property of the xy graph off to renew the data(so he lets al the points on the graph, he draws a line but only in the X-movement and the Y-MOVEMENT doesnt do anything.

the point moves nice in a elips like it schould , but when i put de property of he makes a line but no more elips.

does somebody have an idea what te problem is?

thanks joachim 

[Henrik_Volkers]

Just try to store some values in a buffer. The chart will store 1000 values history by default. For the xy graph you have to provide the data  😉

Look at the XY chart.vi example .