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Set dashed lines in plot points?

Dimitris PAPAIOANNOU
Posted 6 years ago

hi, i'made a graphic represantation of f(x)=2x function and i want to mark some of the points with dashed lines across the axes x and y.Can anybody help me please?Below i give you the code so far. Thank you.

Plot[{2 x}, {x, 0, 10}, PlotLabel -> ??????? ?????????, AxesLabel -> {?????????, ???????}, 
 Epilog -> {PointSize[Large], Point[{{0, 0}, {1, 2}, {2, 4}, {3, 6}, {6, 12}, {10, 20}}]}, 
 Ticks -> {{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, {0, 1, 2, 3, 5, 10, 12,15, 20}}]
POSTED BY: Dimitris PAPAIOANNOU
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Yes, thank you very much for the reply!
POSTED BY: Dimitris PAPAIOANNOU
Rohit Namjoshi
Rohit Namjoshi
Posted 6 years ago

Hi Dimitris,

Is this what you are trying to do?

points = {{0, 0}, {1, 2}, {2, 4}, {3, 6}, {6, 12}, {10, 20}};
yAxisPoints = {0, Last[#]} & /@ points;
xAxisPoints = {First[#], 0} & /@ points;
yLines = {Directive[Dashed], Line[#]} & /@ Transpose[{points, yAxisPoints}];
xLines = {Directive[Dashed], Line[#]} & /@ Transpose[{points, xAxisPoints}];

Plot[{2 x}, {x, 0, 10}, 
 Epilog -> {PointSize[Large], Point[points], yLines, xLines}, 
 Ticks -> {{0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, {0, 1, 2, 3, 5, 10, 12, 15, 20}}]

I left out the labels

enter image description here
POSTED BY: Rohit Namjoshi
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