Write a function drawBox which draws boxes on the screen

Question

Khalid Khan 2016-11-30

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回答： Abu Yamen 2016-12-3

I got a task but I am confused. This is My task The function is called with a character (ch) as the first argument and two positive integers which represent the width and the height of the box to be drawn. It automatically draws a box with the character (ch) by the specified width and height. Can Anyone help me out with the task.

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Abu Yamen 2016-12-3

function []= drawBox('s',w,h)

ch =input('ch-ch ','s'); w =input('width : '); h =input('hight : ');

x = repmat(ch, h, w); x(2:end-1, 2:end-1) = char(32); disp(x); end

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Answer 1

KSSV 2016-11-30

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https://ww2.mathworks.cn/matlabcentral/answers/314681-write-a-function-drawbox-which-draws-boxes-on-the-screen#answer_245310

编辑：KSSV 2016-11-30

在 MATLAB Online 中打开

function drawBox(str,w,h)
ch = [0. 0.] ;
%%get four corners of box
N = 20 ;
x = linspace(ch(1),ch(1)+w,N) ;
y = linspace(ch(2),ch(2)+h,N) ;
[X,Y] = meshgrid(x,y) ;
X(2:end-1,2:end-1) = NaN ;
Y(2:end-1,2:end-1) = NaN ;
x = X(~isnan(X)) ;y = Y(~isnan(Y)) ;
plot(x,y,'.w') ; hold on
text(x,y,str)
axis off

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Khalid Khan 2016-11-30

编辑：Khalid Khan 2016-11-30

Thank You Sir It worked

rim 2016-12-2

编辑：rim 2016-12-2

its not working for me , please help me with this question its showing error in functio drawBox

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Answer 2

KSSV 2016-11-30

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/314681-write-a-function-drawbox-which-draws-boxes-on-the-screen#answer_245308

在 MATLAB Online 中打开

what is ch? Actually to draw a box four numbers are needed. First two position/ origin of the box and then width, height. I think ch is a 1x2 array with two numbers which represent position of the box.

ch = [1. 1.] ;
h = 1. ;
w = 0.5 ;
box = [ch w h] ;
%%get four corners of box
p = [ch(1) ch(2) ;
ch(1)+w ch(2) ;
ch(1)+w ch(2)+h ;
ch(1) ch(2)+h ;
ch(1) ch(2)] ;
plot(p(:,1),p(:,2),'r')

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Khalid Khan 2016-11-30

feg bog 2016-11-30

编辑：feg bog 2016-11-30

the given code do not give the wanted output is there is wrong on the code , or what !! i am confused i.e. is necessary to use plot or normal printf code?

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