在SPSS中是否有Python代码来对所有数值问题中的特定值进行重新编码?

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英文:

Is there a Python code in SPSS to RECODE a specific value in all numeric questions?

问题

我正在使用SPSS工作,需要创建语法来重新编码所有数字变量,但只在另一个值的特定值的情况下才这样做。

对于所有数字变量,我需要在变量status=0的情况下将值50重新编码为缺失值。

我需要找到一种自动执行此操作的方法,而不需要列出所有变量,因为我需要一种通用的代码,可以用于不同的数据集,这就是为什么我考虑在SPSS中使用Python代码,但我对此了解有限。

因此,代码应该类似于以下内容,但要通用,以便自动选择所有数字变量(不包括字符串变量):

BEGIN PROGRAM.
import spssdata as spss
import spssaux

# Get the list of all variables in the dataset
all_vars = spssaux.GetVariableNamesList()
numeric_vars = []

# Filter out only the numeric variables
for var in all_vars:
    var_type = spssaux.GetVariableType(var)
    if var_type == 0:  # 0 represents numeric variables
        numeric_vars.append(var)

# Loop through the numeric variables and recode 50 to missing if status=0
for var in numeric_vars:
    spss.Submit(f"DO IF (status=0).\nRECODE {var} (50=sysmis)(else=copy).\nEND IF.")

END PROGRAM.

请确保在SPSS中以Python代码的形式运行此代码来自动重新编码所有数字变量中值为50且status=0的情况。

英文:

I am working in SPSS and I need to create syntax to recode all numeric variables but only in case of a specific value of another value.

For all numeric variables I need to recode the value 50 to missing only in case that the variable status=0.

I need to find a way to do this automatically without listing all variables as I need a generic code that I can use for different datasets which is why I was thinking of using Python code within SPSS, but I have limited knowledge with that.

So it would need to be something like below, but then generic so that it selects automatically all numeric variables (excluding string variables)

DO IF (status=0).
 RECODE Q1 Q2 Q3 (50=sysmis)(else=copy).
END IF.

答案1

得分: 1

你可以使用spssinc select variables扩展命令来制作所有数值变量的列表,然后在常规语法中使用该列表。因此,对于每个新数据集,您可以运行以下命令:

DO IF (status=0).
 RECODE !numericVars (50=sysmis)(else=copy).
END IF.
英文:

You can use spssinc select variables extention command to make a list of all your numeric variables and then use the list in regular syntax. So for every new dataset you can run this:

spssinc select variables macroname="!numericVars" /properties type = NUMERIC.
DO IF (status=0).
 RECODE !numericVars (50=sysmis)(else=copy).
END IF.

答案2

得分: 0

以下是代码的翻译部分:

# 这是一个演示如何在SPSS中使用`spss`模块实现的Python代码段:

import spss

# 指定要重新编码的值
old_value = 999

# 指定要分配的新值
new_value = 888

# 获取活动数据集中所有数值变量的列表
numeric_vars = spss.GetVariableList().expand(spss.VariableType.NUMERIC)

# 遍历每个数值变量并重新编码特定值
for var_name in numeric_vars:
    spss.Compute("{}.Recoded = {}.".format(var_name, new_value), var_name + " = {}".format(old_value))

# 提交更改到数据集
spss.Submit("DATASET SAVE.")

# 打印成功消息
print("重新编码成功完成。")
英文:

This is a Python code snippet that demonstrates how you can achieve this in SPSS using the spss module:

import spss

# Specify the value you want to recode
old_value = 999

# Specify the new value to assign
new_value = 888

# Get a list of all numeric variables in the active dataset
numeric_vars = spss.GetVariableList().expand(spss.VariableType.NUMERIC)

# Loop through each numeric variable and recode the specific value
for var_name in numeric_vars:
    spss.Compute("{}.Recoded = {}.".format(var_name, new_value), var_name + " = {}".format(old_value))

# Commit the changes to the dataset
spss.Submit("DATASET SAVE.")

# Print a success message
print("Recode completed successfully.")

答案3

得分: 0

Eli-k的回答是最高效的回答,可以直接使用,但由于问题提到了Python,并且为了展示SPSS Python集成的强大功能,这里是我编写的一个自定义类示例:

import spss
import spssaux

class Dataset:

    def __init__(self):
        self.varlist = spssaux.VariableDict().expand(spss.GetVariableName(0) + " to " + spss.GetVariableName(spss.GetVariableCount()-1))

    def getNumeric(self):
        nums = [v for v in self.varlist if spss.GetVariableType(self.varlist.index(v)) == 0]
        return nums 

    def recodeNumeric(self, code1, code2, if_clause = ''):
        nums = self.getNumeric()
        if if_clause == '':
            for num in nums:
                spss.Submit(f"recode {num} ({code1}={code2}).")
        else:
            for num in nums:
                spss.Submit(fr'''do {if_clause}.
recode {num} ({code1}={code2}).
end if.''')

现在你只需要使用你的数据集来实例化这个类:

dta = Dataset()

然后在实例上调用recodeNumeric()方法:

dta.recodeNumeric(50, "sysmis", "if status = 0")

但需要注意正确传递参数,数字可以保持整数,但sysmis需要传递为字符串,并且if语句需要符合SPSS语法规则。

英文:

Eli-k's answer is the most efficient answer and works like a charm out of the box, but since the question referenced python and to showcase how powerful the spss python integration can be, here is a custom class I wrote to do just that:

import spss
import spssaux

class Dataset: 

    def __init__(self): 
        self.varlist = spssaux.VariableDict().expand(spss.GetVariableName(0) + " to " + spss.GetVariableName(spss.GetVariableCount()-1))

    def getNumeric(self):
        nums = [v for v in self.varlist if spss.GetVariableType(self.varlist.index(v)) == 0]
        return nums 

    def recodeNumeric(self, code1, code2, if_clause = ''):
        nums = self.getNumeric()
        if if_clause == '':
            for num in nums:
                spss.Submit(f"recode {num} ({code1}={code2}).)")
        else:
            for num in nums:
                spss.Submit(fr'''do {if_clause}. 
    recode {num} ({code1}={code2}).
    end if.''')

basically, all you have to do now is instantiate the class with you dataset:

dta = Dataset()

and the call the recodeNumeric() method on the instance:

dta.recodeNumeric(50, "sysmis", "if status = 0")

be mindful though of passing your arguments correctly, numbers can remain int but sysmis for example needs to be passed as string and the if statement needs to be correct in the sense that it needs to conform to SPSS-syntax rules.

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  • 本文由 发表于 2023年6月29日 16:30:01
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