Skip to main content

graphics - How to draw rectangle in mathematica with arrow


I have a basic question but i cant seem to find an answer for it.


How do i draw a rectangle in mathematica with either clockwise or counterclockwise arrow heads. enter image description here


In this picture i know two points i.e. (xmin,ymin) and (xmax,ymax). I want to stepwise quench my system and show it in this picture and hence many rectangles between min and max.


Rectangle command doesnt seem to provide an answer. And i want to do it with very many points, hence couple of answers that are available in forum are not so useful.


(-1+X+1/(1/3+(-3.+3 X)/(3 (1.*10^-18+4.5*10^-12 (2+X)+2.59808*10^-9 Sqrt[4.*10^-12-4 (-1+X)^3+1.*10^-6 (8-(-20+X) X)])^(1/3))+333333. (1.*10^-18+4.5*10^-12 (2+X)+2.59808*10^-9 Sqrt[4.*10^-12-4 (-1+X)^3+1.*10^-6 (8-(-20+X) X)])^(1/3)))/X

This is the plotted function f.



Now i want to select two X values say X=1.1 and X=3 and divide interval into N parts X = {X1, X2, X3, X4, X5} and directed rectangle between each of the two consecutive values.


Because i cant do it in mathematica i drew it in paint and it looks something like this with clockwise arrows for each rectangle.


enter image description here


Thanks, Nitin



Answer



Because using Graph is fun:


f[x_] := Sqrt@x
x = {1.1, 1.6, 2.2, 2.4, 3}; (* put any thing you want here *)
coord = {First@#, {First@#[[2]], Last@#[[1]]}, Last@#, {First@#[[1]], Last@#[[2]]}} & /@
Partition[{#, f@#} & /@ x, 2, 1];

ef1[el_, ___] := {Arrowheads@0.03, Arrow[el]}
g = Graph[{1 -> 2, 2 -> 3, 3 -> 4, 4 -> 1},
VertexCoordinates -> #,
EdgeShapeFunction -> ef1] & /@ coord;
Show[Plot[f[x], {x, 0, 5}, Frame -> True], g]

enter image description here


Then you can play with EdgeStyle or VertexStyle in g to have fancy colors (or see Graph's Options for more details) and with Arrowheads to have bigger/smaller heads.




Additions regarding coord (as requested in the comments):



If you consider that {{x1,y1},{x2,y2},{x3,y3}} are the coordinates of the three first points crossing f@x you need to group them in order to create two rectangles:


rectgroups = Partition[{{x1,y1},{x2,y2},{x3,y3}}, 2, 1]


{{{x1, y1}, {x2, y2}}, {{x2, y2}, {x3, y3}}}



with {{x1, y1}, {x2, y2}} and {{x2, y2}, {x3, y3}} forming two rectangles by their opposed coordinates.


The problem here is that in order to draw a rectangle while using VertexCoordinates (it's in fact not the case with Rectangle) you need the four points defining your rectangle. Thus:


makerect = {First@#, {First@#[[2]], Last@#[[1]]}, Last@#, {First@#[[1]], Last@#[[2]]}}&;
makerect /@ rectgroups



{{{x1, y1}, {x2, y1}, {x2, y2}, {x1, y2}}, {{x2, y2}, {x3, y2}, {x3, y3}, {x2, y3}}}



gives you the two other coordinates needed to define the rectangles ({x2,y1} and {x1,y2} in the first case).


Comments

Popular posts from this blog

plotting - How to draw lines between specified dots on ListPlot?

I would like to create a plot where I have unconnected dots and some connected. So far, I have figured out how to draw the dots. My code is the following: ListPlot[{{1, 1}, {2, 2}, {3, 3}, {4, 4}, {1, 4}, {2, 5}, {3, 6}, {4, 7}, {1, 7}, {2, 8}, {3, 9}, {4, 10}, {1, 10}, {2, 11}, {3, 12}, {4,13}, {2.5, 7}}, Ticks -> {{1, 2, 3, 4}, None}, AxesStyle -> Thin, TicksStyle -> Directive[Black, Bold, 12], Mesh -> Full] I have thought using ListLinePlot command, but I don't know how to specify to the command to draw only selected lines between the dots. Do have any suggestions/hints on how to do that? Thank you. Answer One possibility would be to use Epilog with Line : ListPlot[ {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {1, 4}, {2, 5}, {3, 6}, {4, 7}, {1, 7}, {2, 8}, {3, 9}, {4, 10}, {1, 10}, {2, 11}, {3, 12}, {4, 13}, {2.5, 7}}, Ticks -> {{1, 2, 3, 4}, None}, AxesStyle -> Thin, TicksStyle -> Directive[Black, Bold, 12], Mesh -> Full, Epilog -> { Line[ ...

dynamic - How can I make a clickable ArrayPlot that returns input?

I would like to create a dynamic ArrayPlot so that the rectangles, when clicked, provide the input. Can I use ArrayPlot for this? Or is there something else I should have to use? Answer ArrayPlot is much more than just a simple array like Grid : it represents a ranged 2D dataset, and its visualization can be finetuned by options like DataReversed and DataRange . These features make it quite complicated to reproduce the same layout and order with Grid . Here I offer AnnotatedArrayPlot which comes in handy when your dataset is more than just a flat 2D array. The dynamic interface allows highlighting individual cells and possibly interacting with them. AnnotatedArrayPlot works the same way as ArrayPlot and accepts the same options plus Enabled , HighlightCoordinates , HighlightStyle and HighlightElementFunction . data = {{Missing["HasSomeMoreData"], GrayLevel[ 1], {RGBColor[0, 1, 1], RGBColor[0, 0, 1], GrayLevel[1]}, RGBColor[0, 1, 0]}, {GrayLevel[0], GrayLevel...

Is there a way to do conditional matrix loop using 'continue'

I have the following: n = 3; m = 5; ww = RandomReal[{0, 0.1}, {n, n}]; uu = RandomReal[{0, 1}, {m, n}]; pp = RandomReal[{0, 1}, {n, n}]; ss = RandomInteger[{0, 5}, {m, n}]; Grid[{{"ww", "uu", "pp", "ss"}, {ww // TableForm, uu // TableForm, pp // TableForm, ss // TableForm}}, Spacings -> {5, 2}, Dividers -> All] where I would like to look at every element of matrix ss and produce a matrix tt , with zeroes at the locations in ss which have zeroes, and in all other positions do the following: tt = (-1/Subscript[ww, m]) Log[(1 - uu)/(Subscript[pp, m - 1])], where Subscript[ww, m] is the value at index of ww matrix and where Subscript[pp, m - 1] is the value at index-1 of pp matrix. So for example if the first value ever read from matrix ss happens to be 2, then value taken from matrix ww would be from the row 2, but from pp would be from row 1. Also how to tell difference between a 0 as a valid value from within the matrix elemen...