matlab大地坐标与经纬度转换 如何把经纬度转化为大地坐标

txt文件数据修改成我的数据后，替换了文件名，程序运行后出现了两个问题：

一：弹出图像框但没有内容 图像框里是空白的，这事为什么？

二：输出的coordinate.txt文件里数据怎样处理精度问题，就像您贴出来的转换后的坐标似地能保留到小数点后很多位？请看附录二

附录一：我的程序

>> L=dlmread('hangji01.txt');

axesm utm

Z=utmzone(L(1,1),L(1,2));

setm(gca,'zone',Z)

h = getm(gca)

R=zeros(size(L));

for i=1:length(L)

[x,y]= mfwdtran(h,L(i,1),L(i,2));

R(i,:)=[x;y];

end

dlmwrite('coordinate.txt',R)

h =

mapprojection: 'utm'

zone: '50S'

angleunits: 'degrees'

aspect: 'normal'

falsenorthing: 0

falseeasting: 500000

fixedorient: []

geoid: [6.3774e+006 0.0817]

maplatlimit: [32 40]

maplonlimit: [114 120]

mapparallels: []

nparallels: 0

origin: [0 117 0]

scalefactor: 0.9996

trimlat: [-80 84]

trimlon: [-180 180]

frame: 'off'

ffill: 100

fedgecolor: [0 0 0]

ffacecolor: 'none'

flatlimit: [32 40]

flinewidth: 2

flonlimit: [-3 3]

grid: 'off'

galtitude: Inf

gcolor: [0 0 0]

glinestyle: ':'

glinewidth: 0.5000

mlineexception: []

mlinefill: 100

mlinelimit: []

mlinelocation: 1

mlinevisible: 'on'

plineexception: []

plinefill: 100

plinelimit: []

plinelocation: 1

plinevisible: 'on'

fontangle: 'normal'

fontcolor: [0 0 0]

fontname: 'helvetica'

fontsize: 9

fontunits: 'points'

fontweight: 'normal'

labelformat: 'compass'

labelrotation: 'off'

labelunits: 'degrees'

meridianlabel: 'off'

mlabellocation: 1

mlabelparallel: 40

mlabelround: 0

parallellabel: 'off'

plabellocation: 1

plabelmeridian: 114

plabelround: 0

附录二：coordinate.txt文件里部分数据

7.0444e+005,3.5555e+006

7.0444e+005,3.5555e+006

7.0443e+005,3.5555e+006

7.0443e+005,3.5555e+006

7.0443e+005,3.5555e+006