Why is the rectangle() function not recognized?

I have a 2D floor plan image. I want to have bounding boxes around the rooms in it. When I use rectangle function to draw rectangles, error 'Unrecognised function of variable 'rectangle' '. Can somebody help me please?

Here is my code:

BW1=imread('wallimage_withnodoor.jpg');
BW1=im2bw(BW1);
Rooms = regionprops(BW1,'BoundingBox');
imshow(BW1); hold on
for k=1:length(Rooms)
    currbb=Rooms(k).BoundingBox;
    rectangle('Position',[currbb(1),currbb(2),currbb(3),currbb(4)], 'EdgeColor','r','LineWidth',2);
end
hold off

This is the error which I am getting:

Unrecognized function or variable 'rectangle'.

Error in classify_objects_test1 (line 46)
    rectangle('Position',[currbb(k),currbb(2),currbb(3),currbb(4)], 'EdgeColor','r','LineWidth',2);
 

Here is the image I used:

I want to have the bounding boxes around each room in the image.

[Mehmed Saad]

type in command window

which rectangle

and post the answer here

[madhan ravi]

which rectangle -all

[CHINTALA NIRMAL SRINIVAS]

Iam getting 'built-in (C:\Program Files\MATLAB\R2019b\toolbox\matlab\graphics\primitive\rectangle)'

[Walter Roberson]

Is there more code than this? In particular, do you happen to use a variable named path ?

[CHINTALA NIRMAL SRINIVAS]

Yes still there is more code than this. That part is to identify objects in image. But there is no variable named path

[Walter Roberson]

dbstop if error

and run your code. When it stops,

which -all rectangle

[Walter Roberson]

Is it possible that you are running scripts (instead of calling functions), and at the same time you call load without any output arguments, and one of the .mat files being loaded includes a variable named rectangle ?

When there are potentially conflicts between variable names load()'d, and function names that are the same as the variable names, there are some cases where MATLAB can make arbitrary decisions about whether the name refers to a function or a variable.

[CHINTALA NIRMAL SRINIVAS]

You are right. It is working when I wrote it seperately.

Answer 1

[madhan ravi]

built-in (/MATLAB/toolbox/matlab/graphics/primitive/rectangle)

If you see other than the above after using

which rectangle -all

Y ou need to remove or rename those file/s.

[CHINTALA NIRMAL SRINIVAS]

built-in (C:\Program Files\MATLAB\toolbox\matlab\graphics\primitive\rectangle)

What should I do now?