需要以下曲线才能成为一种颜色？ （MATLAB）

Question

我是新来的，对matlab的经验很少。

这里我有一个等高线图，轮廓之间的每个区域用不同颜色描绘在一个颜色条上。我想知道如何防止这种着色，而只是让它有一种颜色。

还有一件事，我想知道如果我想添加条件或换句话说是黑色（因为我的颜色条中没有黑色） 就像deltabeta = -2 gamma P使deltabeta黑色是可能的

%gamma=20;
gamma=580;
%P=0.1;
P=0.75;
N=P.*gamma;
lamdazero=1550;
[lamdapump,lamdasignal] = meshgrid(1550:0.1:1700,1550:0.1:1700);
beta3=1.3;
beta4=-8*10^-4;
%beta3=0.06;
%beta4=-2*10^-4;
c=2*pi*3*10^8;
%L=1;
L=0.01;
A0=(1./lamdapump) -(1./lamdazero);
B0=(1./lamdapump) -(1./lamdasignal);
%Linearmismatch=beta2.*c.^2.*(B0).^2;
%beta2=(6*pi.*10^5.*beta3.*A0) +(0.5.*beta4.*A0.^2).*(6.*pi.*10^5)^2;
%Second0=(1./2).*beta2.*(c.^2).*(B0.^2);
Third0=10^-9.*beta3.*(c.^3).*A0.*(B0.^2);
Fourth0=10^-12.*beta4.*(1./2).*c.^4.*(A0.^2).*(B0.^2);
%S4=(10^-12/12).*beta4.*c.^4*(B0.^4);
Fourorder=(10^-12).*c.^4.*beta4.*(1/12).*(B0).^4;
g0=1.1*10^-11;
Aeff=11*10^-12;
PSBS=0.025;
%g0=3.9*10^-9;
%Aeff=14*10^-12;
%PSBS=0.005;
SBS=(g0.*PSBS.*1000)./Aeff ;
deltabeta=Third0+Fourth0+Fourorder;
hold on
 for i=1:1:length(deltabeta)
    for j=1:1:length(deltabeta)
       if(deltabeta(i,j)>=0 || deltabeta(i,j)<=(-4*N))
         test(i,j)=NaN;
       else
          test(i,j)=deltabeta(i,j);
        end
    end
 end
contourf(lamdapump,lamdasignal,test,'ShowText','off');
cmap=[0,0,0];
colormap=cmap;
colorbar
 h = colorbar;
 set(get(h,'title'),'string','\Delta \beta (\gamma P)');
ax = findobj('type','axes');
%set(ax(1),'ytickl',{'-5172.4', '-4310.3', '-3448.3', '-2586.2', '-1724.1',' -862.1', '0', '862.1', '1724.1'})
 xlabel('\lambda_p_u_m_p')
ylabel('\lambda_s_i_g_n_a_l')
title('Contour representing linear phase mismatch for FWM pump power 75 mW and SBS pump power 25 mW ')

Answer 1

指定一种颜色

您可以在声明caxis([0, 10]);之前声明h = colorbar;来设置颜色栏中使用的颜色限制。例如，在这里，我发现所有东西都看起来都是深蓝色而没有去掉轮廓。在我的示例中，0是最小颜色值，10是最大值 - 您可以更改这些值以匹配您喜欢的颜色。

删除颜色栏

您也可以使用delete(h)

删除右侧的颜色条

<强>代码

%gamma=20;
gamma=580;
%P=0.1;
P=0.75;
N=P.*gamma;
lamdazero=1550;
[lamdapump,lamdasignal] = meshgrid(1550:0.1:1700,1550:0.1:1700);
beta3=1.3;
beta4=-8*10^-4;
%beta3=0.06;
%beta4=-2*10^-4;
c=2*pi*3*10^8;
%L=1;
L=0.01;
A0=(1./lamdapump) -(1./lamdazero);
B0=(1./lamdapump) -(1./lamdasignal);
%Linearmismatch=beta2.*c.^2.*(B0).^2;
%beta2=(6*pi.*10^5.*beta3.*A0) +(0.5.*beta4.*A0.^2).*(6.*pi.*10^5)^2;
%Second0=(1./2).*beta2.*(c.^2).*(B0.^2);
Third0=10^-9.*beta3.*(c.^3).*A0.*(B0.^2);
Fourth0=10^-12.*beta4.*(1./2).*c.^4.*(A0.^2).*(B0.^2);
%S4=(10^-12/12).*beta4.*c.^4*(B0.^4);
Fourorder=(10^-12).*c.^4.*beta4.*(1/12).*(B0).^4;
g0=1.1*10^-11;
Aeff=11*10^-12;
PSBS=0.025;
%g0=3.9*10^-9;
%Aeff=14*10^-12;
%PSBS=0.005;
SBS=(g0.*PSBS.*1000)./Aeff ;
deltabeta=Third0+Fourth0+Fourorder;
hold all
 for i=1:1:length(deltabeta)
    for j=1:1:length(deltabeta)
       if(deltabeta(i,j)>=0 || deltabeta(i,j)<=(-4*N))
         test(i,j)=NaN;
       else
          test(i,j)=deltabeta(i,j);
        end
    end
 end
contourf(lamdapump,lamdasignal,test,'ShowText','off');
cmap=[0,0,0];
colormap=cmap;
caxis([0, 10]);  % decide the color of your contour plot here
h = colorbar;
pause(1);
set(get(h,'title'),'string','\Delta \beta (\gamma P)');
ax = findobj('type','axes');
%set(ax(1),'ytickl',{'-5172.4', '-4310.3', '-3448.3', '-2586.2', '-1724.1',' -862.1', '0', '862.1', '1724.1'})
 xlabel('\lambda_p_u_m_p')
ylabel('\lambda_s_i_g_n_a_l')
title('Contour representing linear phase mismatch for FWM pump power 75 mW and SBS pump power 25 mW ')
delete(h);