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Matlabs椭圆小时计算_Matlab_Geolocation_Geocoding_Ellipse_Hour - Fatal编程技术网

Matlabs椭圆小时计算

Matlabs椭圆小时计算,matlab,geolocation,geocoding,ellipse,hour,Matlab,Geolocation,Geocoding,Ellipse,Hour,我做日晷模拟器,画椭圆,然后在椭圆上画小时。我们的每一项工作都由以下方面规定: x = a * sin(t); y = b * cos(t); 其中: a- length of longer semi-axis b- length of smaller semi-axis t- hour in degrees ( 1 hour == 15 degrees) 我在Matlab中编写了这个函数: function [hx,hy] = calcHourCoords(ra,rb) %inpu

我做日晷模拟器,画椭圆,然后在椭圆上画小时。我们的每一项工作都由以下方面规定:

x = a * sin(t);
y = b * cos(t);
其中:

a- length of longer semi-axis
b- length of smaller semi-axis
t- hour in degrees ( 1 hour == 15 degrees)
我在Matlab中编写了这个函数:

function [hx,hy] = calcHourCoords(ra,rb)
    %input:
    %ra, rb length of semi-axis in ellipse
    %output:
    %hx, hy coords of hour's plot
    hourAngle = 15*180/pi;
    step = 0;
    for i=1:1:24
       hx(i)= ra * sin(step);
       hy(i)= rb * cos(step);
       step = step+hourAngle;
    end
end
最后我得到了那张照片:

但它应该是这样的:

椭圆是正确的,我为其他纬度绘制了我的版本

也许有人能帮我

对不起,我说的是英语:

编辑

我修复它-只需将度转换为弧度

编辑2


< >我改变源代码FY/

因为你解决了你的问题,考虑你自己的答案并接受它,或者把你的问题全部删除。

function [hx,hy] = calcHourCoords(ra,rb)
    %input:
    %ra, rb length of semi-axis in ellipse 
    %output:
    %hx, hy coords of hour's plot
    hourAngle = 15*pi/180;
    step = 0;
       for i=1:1:24
           hx(i)= ra * sin(step);
           hy(i)= rb * cos(step);
           step = step+hourAngle;
       end
end