有一个csv文件,列分别为year,month,day,gender,births,画出1969年-2008年每年出生总人数条形图
时间: 2024-03-11 10:43:40 浏览: 5
可以使用 Matlab 中的 readtable() 函数读取 CSV 文件,并使用 bar() 函数画出条形图。具体步骤如下:
1. 读取 CSV 文件,将数据存储到一个 table 变量中:
```
filename = 'births.csv';
data = readtable(filename);
```
2. 提取出年份和出生人数的数据:
```
year = data.year;
births = data.births;
```
3. 计算每年的出生总人数:
```
unique_years = unique(year);
num_births = zeros(size(unique_years));
for i = 1:length(unique_years)
year_idx = year == unique_years(i);
num_births(i) = sum(births(year_idx));
end
```
4. 选择 1969 年到 2008 年的数据:
```
start_year = 1969;
end_year = 2008;
selected_years = start_year:end_year;
selected_births = num_births(selected_years - unique_years(1) + 1);
```
5. 画出条形图:
```
bar(selected_years, selected_births);
xlabel('Year');
ylabel('Number of Births');
title('Number of Births per Year (1969-2008)');
```
完整的代码如下:
```
filename = 'births.csv';
data = readtable(filename);
year = data.year;
births = data.births;
unique_years = unique(year);
num_births = zeros(size(unique_years));
for i = 1:length(unique_years)
year_idx = year == unique_years(i);
num_births(i) = sum(births(year_idx));
end
start_year = 1969;
end_year = 2008;
selected_years = start_year:end_year;
selected_births = num_births(selected_years - unique_years(1) + 1);
bar(selected_years, selected_births);
xlabel('Year');
ylabel('Number of Births');
title('Number of Births per Year (1969-2008)');
```