How to plot conitinous histogram?

Hi,

i plot two histograms. I can plot one of them continiously (figure1), but i can't plot another one continiously (figure2). How can i plot figure2 like figure1?

here is my code:

input_image = imread('test1.bmp');
input_image = rgb2gray(input_image);
input_image = uint8(input_image);
histogram_of_image = imhist(input_image);
figure;
plot(histogram_of_image);
Outp_Same = histeq( input_image);
Outp_Same_Hist = imhist(Outp_Same);
figure;
plot(Outp_Same_Hist);