shuju <- read.csv("D:/2021113133.csv", header = TRUE)data <- data.frame(matrix(NA, nrow = 835, ncol = 5))colnames(data) <- c("id", "wd", "jd", "bj", "zx")for (i in 1:835) { data[i, "id"] <- i}data[, "wd"] <- shuju$wddata[, "jd"] <- shuju$jddata[, "bj"] <- shuju$bjdata[, "zx"] <- shuju$zxshuju2 <- read.csv("D:/2021113133.csv", header = TRUE)data3 <- data.frame(matrix(NA, nrow = 1877, ncol = 6))colnames(data3) <- c("id", "wd", "jd", "xe", "sj", "xy")data3[, "wd"] <- shuju2$wddata3[, "jd"] <- shuju2$jddata3[, "xe"] <- shuju2$xedata3[, "sj"] <- shuju2$sjdata3[, "xy"] <- shuju2$xyfor (i in 1:1877) { data3[i, "id"] <- i} d <- matrix(NA, nrow = 835, ncol = 1877)r <- 0.05 for (m in 1:835) { for (n in 1:1877) { d[m,n] <- sqrt((data3[n, "jd"] - data[m, "jd"]) ^ 2 + (data3[n, "wd"] - data[m, "wd"]) ^ 2) }}xe <- numeric(835)for(i in 1:835){ c <- 0 for(j in 1:1877){ if(d[m,n] <= r) c <- c + data3[j, "xe"] } xe[i] <- c}cor(data[,"bj"], xe)
时间: 2023-07-19 11:27:33 浏览: 81
这段代码的功能是读取一个名为"2021113133.csv"的文件,并将其中的数据存储在两个数据框data和data3中。然后,使用两个for循环计算了数据框data中每个点与数据框data3中每个点之间的距离,并将结果存储在矩阵d中。接下来,计算了一个半径为0.05的圆内,data3中每个点的xe值的总和,并将结果存储在向量xe中。最后,使用cor函数计算了data数据框中"bj"列与xe向量之间的相关系数。
相关问题
python中有一个items的列表 需要将下列列表中的shuju替换成touzhu https://odds.500.com/fenxi/shuju-1070052.shtml https://odds.500.com/fenxi/shuju-1043590.shtml 要求结果是这样: https://odds.500.com/fenxi/touzhu-1070052.shtml https://odds.500.com/fenxi/touzhu-1043590.shtml怎么做
可以使用Python中的replace()方法来实现这个需求:items = [https://odds.500.com/fenxi/shuju-1070052.shtml, https://odds.500.com/fenxi/shuju-1043590.shtml] new_items = [item.replace('shuju', 'touzhu') for item in items] 最后的结果就是:new_items = [https://odds.500.com/fenxi/touzhu-1070052.shtml, https://odds.500.com/fenxi/touzhu-1043590.shtml]
python中有一个items的列表 需要将下列列表中的shuju替换成touzhu然后保存到new_items https://odds.500.com/fenxi/shuju-1070052.shtml https://odds.500.com/fenxi/shuju-1043590.shtml 要求结果是这样: https://odds.500.com/fenxi/touzhu-1070052.shtml https://odds.500.com/fenxi/touzhu-1043590.shtml
下面是实现该需求的代码:
```
items = ['https://odds.500.com/fenxi/shuju-1070052.shtml', 'https://odds.500.com/fenxi/shuju-1043590.shtml']
new_items = []
for item in items:
new_item = item.replace('shuju', 'touzhu')
new_items.append(new_item)
print(new_items)
```
输出结果为:
```
['https://odds.500.com/fenxi/touzhu-1070052.shtml', 'https://odds.500.com/fenxi/touzhu-1043590.shtml']
```
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