In mid-2019 President of the Republic of Indonesia officially decided that the capital city be moved outside of Java. This has caused many responses from the public who responded to this decision. We have seen many of these community responses on social media, especially in Twitter. To see the reality of the response of the Indonesian people requires a study that can draw conclusions from the number of community responses. So from this problem this study was conducted to find the truth of the community response related to the decision to move the Indonesian capital by using the lexicon method. This study also wants to see a comparison of the effect of the stemming process on sentiment analysis. To measure the performance of the Lexicon method, this research will be tested by an expert. Then the results of the experts will be entered into the confusion matrix. From the calculations with the confusion matrix, the results showed that the response of many Indonesian people who agree with the decision to move the Indonesian capital.
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