How do I make shape display in black colour and background in white colour?

This is my code below

subplot(1,3,1); % subplot(m,n,p) m and n define the array of all the images together, and p defines the position of this particular plot in that array

%as an example subplot(1,3,1) says that there is 1 row of plots, 3 columns

%and the following plot should be placed in position 1

% Create a logical image of a circle with specified

% diameter, center, and image size.

% First create the image.

imageSizeX = 640;

imageSizeY = 480;

[columnsInImage, rowsInImage] = meshgrid(1:imageSizeX, 1:imageSizeY); % Next create the circle in the image.

centerX = 320;

centerY = 240;

radius = 100;

circlePixels = (rowsInImage - centerY).^2 ... + (columnsInImage - centerX).^2 <= radius.^2;

% circlePixels is a 2D "logical" array.

% Now, display it.

image(circlePixels) ;

colormap([0 0 0; 1 1 1]);

axis equal; %makes circle look like a circle by giving axis equal distribution

axis off; %hide the axis

subplot(1,3,2);

% Create a logical image of a circle with specified

% diameter, center, and image size.

% First create the image.

imageSizeX = 640;

imageSizeY = 480;

[columnsInImage, rowsInImage] = meshgrid(1:imageSizeX, 1:imageSizeY); % Next create the circle in the image.

xCenter = 12;

yCenter = 10;

% Modification to the FAQ is the next two lines.

numSides = 7; % <=== CHANGE THIS NUMBER

theta = linspace(0, 2*pi, numSides);

radius = 8;

x = radius * cos(theta) + xCenter;

y = radius * sin(theta) + yCenter;

plot(x, y);

axis square;

xlim([0 20]);

ylim([0 20]);

grid on;

axis equal; %makes circle look like a circle by giving axis equal distribution

axis off;

axis equal; %makes circle look like a circle by giving axis equal distribution

axis off; %hide the axis

subplot(1,3,3);

% Create a logical image of a circle with specified

% diameter, center, and image size.

% First create the image.

imageSizeX = 640;

imageSizeY = 480;

[columnsInImage, rowsInImage] = meshgrid(1:imageSizeX, 1:imageSizeY);

% Next create the circle in the image.

centerX = 320;

centerY = 240;

radius = 100;

circlePixels = (rowsInImage - centerY).^2 ... + (columnsInImage - centerX).^2 <= radius.^2;

% circlePixels is a 2D "logical" array.

% Now, display it.

image(circlePixels) ;

colormap([0 0 0; 1 1 1]);

axis equal; %makes circle look like a circle by giving axis equal distribution

axis off; %hide the axis

Answer 1

[Image Analyst]

Just do

image(~circlePixels);

Or else change your colormap

colormap([1, 1, 1; 0, 0, 0]);

[Yashlin Naidoo]

Hello image analyst in this code my other background is showing cream how do I change that?

[Image Analyst]

In your computer settings for your display or display adapter (nothing to do with MATLAB), there is a setting for color temperature. Like 3200, 5500, 6500, 9500, etc. Try different ones until the white is the shade of white that is most preferable to you.