data = data + data.'; surf(x,x,data,'facecolor','white') view(45,13) set(gca,'dataaspectratio',[1,1,0.08]) grid off xlabel('X') ylabel('Y') Output: image.png 参考资料 How to graph/plot 2D Laplacian of Gaussian (LoG) function in MATLAB or python? LoG算子与DoG算子...
Y= log(X)returns the natural logarithmln(x)of each element in arrayX. Thelogfunction’s domain includes negative and complex numbers, which can lead to unexpected results if used unintentionally. For negative and complex numbersz = u + i*w, the complex logarithmlog(z)returns ...
%module name: spl_log%Description: The lookup table logarithm function.%采用leading位计算Log%input wd2*2=48bit,因为输入数据为48bit,最大可表示为2^48-1,取2的对数的结果小于48.对应6bit。%output wd5 Q7.9(0~128) function spl_f=spl_log(power)globalwd3 wd5;//wd3=9;wd5 = wd3+7;%WDR...
绘制空间圆: %x,y,z是圆心坐标,r是外接圆的半径,n是空间三角形的法向量function[]=DrawCircle(x,y,z,r,n)c=[x,y,z];%圆心的坐标theta=(0:2*pi/100:2*pi)';%theta角从0到2*pia=cross(n,[100]);%n与i叉乘,求取a向量if~any(a)%如果a为零向量,将n与j叉乘a=cross(n,[010]);endb=cros...
This MATLAB function computes the natural logarithm log(1+X) for each element in array X without explicitly computing 1+X.
main.lnFunction() """ 函数ln(e)的值为: 1.0 """ 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 我们可以看到得到的值为1,说明在python中,np.log()指代的便是数学中使用的ln函数。
This MATLAB function computes the natural logarithm log(1+X) for each element in array X without explicitly computing 1+X.
主动旋转和被动旋转:主动旋转是指将向量或坐标系逆时针围绕旋转轴旋转,被动旋转是对坐标轴进行的逆时针旋转,相当于主动旋转的逆操作。 0x01 rotate函数 rotate是matlab官方提供的三维旋转图形函数。 rotate通过给定轴角,使用下列公式转换得到旋转矩阵R,再通过R得到旋转后的图像: ...
利用MATLAB 工具进行实验编程。其参 考程序设计如下: function quadtree(x) f=imread(x); q=2^nextpow2(max(size(f))); [m n]=size(f); f=padarray(f,[q-m,q-n],post); mindim=2; s=qtdecomp(f,@split,mindim,@predicate); lmax=full(max(s(:))); g=zeros(size(f)); marker=zeros(...
The log function is not defined to operate on strings, but you did that when you tried to execute the sub-expression log(s). Use log(k1) there instead. Or if you wanted to compute the log of your truncated approximation in the string s, then you ...