function?[X]?=?appro_elevation（H0msinf）
%==============================================
%function?[X]?=?appro_elevation（H0msinf）
%Calculate?approximate?elevation.

%Input：
%H0:???????the?dot?number?and?Initialized?elevation.
%msinf:???measurement?section?information.

%Output:
%X:?the?dot?number?and?approximate?elevation.
%==============================================
%調換測段起點和終點點號，并把高差觀測值反號，將原有測段信息與其上下拼接。
tt=[fliplr（msinf（?:?1:2））num2cell（-cell2mat（msinf（?:?3）））];
new_msinf=[msinf（?:?1:3）;tt];
len=size（msinf1）;
k=2*len;
X=H0;

%三次循環求未知點近似高程，直到所有點對應高程值不為空。
while?search（X2）==1
????H0=X;
????for?i=1:len
??????????if?isnan（H0{i2}）==1
?????????????????for?j=1:k
?????????????????????ww=new_msinf（j:k:）;
?????????????????????pp=search（ww2H0{i1}1）;
?????????????????????if?strcmp（pp‘undefinde‘）==1
?????????????????????????break;
?????????????????????end
?????????????????????
?????????????????????if?isnan（search（H01pp2））==0
?????????????????????????X{i2}=search（H01pp2）+search（ww2H0{i1}3）;
?????????????????????????break;
?????????????????????end
?????????????????end
??????????end
????end
end
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????1234??2018-11-30?16:49??appro_elevation.m
?????文件????????1234??2018-11-30?18:17??B_L.m
?????目錄???????????0??2018-12-01?14:53??data\
?????文件?????????149??2018-11-25?19:24??data\level?data.txt
?????文件?????????187??2018-11-29?21:55??data\level?data1.txt
?????文件????????3120??2018-11-30?18:21??data\level_result.txt
?????文件????????2532??2018-11-30?18:21??level_net_adjustment.m
?????文件????????1372??2018-11-30?16:25??search.m