Unrecognized function or variable 'x'

classdef Rat <handle
    
    properties
        image = imread('rat_single.tif')       
        location    
        speed = 5      
        direction = 30
    end
    
    methods
        
        function obj = Rat(loc)
            if nargin == 1
                obj.location = loc;
            else 
                obj.location = [0,0];
            end
        end
        
 
        function im  = get_image(self)                         
            im = imrotate_w(self.image, self.direction);
            
        end
          
        function vectors = mouse_vec(self,im)
            global MAX_SPEED;
            multiply_factor = 7; 
            im_cntr = get_image_center(im);
            x_move = cos(self.direction);
            y_move = sin(self.direction);
            vect_move = [x_move,y_move] * (MAX_SPEED * multiply_factor);
            start_vect = im_cntr;
            vectors = [start_vect,vect_move];
            
        end
        
        function plot_rat(self)
            rotd_im = imrotate_w(self.image,self.direction);
            imshow(rotd_im);
            axis on
            hold on;
            vectors = mouse_vec(self,rotd_im);
            quiver(vectors(1),vectors(2),vectors(3),vectors(4)); 
        end 
     end
        
    methods (Static)
        function rot_im = imrotate_w(im, d)
            if((nargin ~= 2) || ndims(im) == 3)
            disp('Wrong number of parameters, or their contents. Exiting...');
            return;
            end
            max_val = max(im(:));  				
            rot_im = max_val - imrotate(max_val - im, d); 
            plot(rot_im);
        end
        
        function center = get_image_center(im)
            info = size(im);
            xR = info(1); 
            yR = info(2); 
            center_x = floor(xR/2);
            center_y = floor(yR/2);
            center = [center_x,center_y]; 
        end
    end
end

the error i get:

Unrecognized function or variable 'get_image_center'.

Error in Rat/mouse_vec (line 44)

im_cntr = get_image_center(im); %finding the center of the image

Error in Rat/plot_rat (line 58)

vectors = mouse_vec(self,rotd_im);

Error in test_rat (line 3)

plot_rat(steve);

>>

ignore the line numbers, these are not correct.

do you have any idea? it tried so many things.

im calling plot_rat from another file in the same dir.

Thank you!

Answer 1

[per isakson]

"Unrecognized function or variable 'get_image_center'."

Replace

im_cntr = get_image_center(im);

by

im_cntr = self.get_image_center(im);

or

im_cntr = Rat.get_image_center(im);

And replace

rotd_im = imrotate_w(self.image,self.direction);

by

rotd_im = self.imrotate_w(self.image,self.direction);

and plot(rot_im); by imshow(rot_im);

See: Debug a MATLAB Program. "the error i get:" It would be helpful if you show how you get them.

[paul_dak]

Thank you it works!

i replaced

im_cntr = get_image_center(im);

with

im_cntr = self.get_image_center(im);

but i dont understand why it is needed, get_image_center is static

[per isakson]

"but i dont understand why it is needed" The simple answer: Matlab is designed that way. Matlab could have been designed as you took for granted.

"get_image_center is static" That makes it possible to use im_cntr = Rat.get_image_center(im);