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【ゼロ→イチ】プログラミング情報サイト

データ分析試験の数学はどこまで必要？統計・行列・確率の「ここまでで十分」ラインをコードで確認

2026年10月9日やまちゃん

「データ分析試験を受けたいけど、数学が出るって聞いて手が止まっています…」「統計とか行列とか、高校数学からやり直さないとダメですか？」こ …

AI・機械学習

機械学習の評価指標入門！正解率が高いのに使えないモデルを混同行列・適合率・再現率で見抜く方法

2026年10月8日やまちゃん

「scikit-learnでモデルを作ったら正解率が95%も出た！…のに、実際に使ってみたら全然役に立たない」機械学習を学び始めると、こん …

Pythonの正規表現入門！reモジュールで日付・電話番号を抜き出してログ集計・入力チェックまで

2026年10月7日やまちゃん

「ログファイルからエラーの行だけ抜き出したい…」「メモに散らばった日付をまとめて同じ形式にそろえたい…」こんなとき、split() や i …

Pythonでファイル名を一括リネーム！日付＋連番で写真を整理して失敗しても元に戻せる自動化入門

2026年10月6日やまちゃん

「スマホから取り込んだ写真が IMG_0012.JPG だらけで、いつの写真か分からない…」「ファイル名を1個ずつ手で変えるのがつらい」こ …

ArduinoでNeoPixel（WS2812B）LEDテープを光らせる！配線・虹色アニメ・電源容量の計算まで解説

2026年10月5日やまちゃん

「ArduinoでLEDを光らせるのはできたけど、テープみたいにたくさん並べて虹色に光らせたい！」「LEDテープを買ってみたけど、配線や電源 …

Python資格の履歴書への書き方とアピール術｜正式名称・資格欄・自己PRの例文つき

2026年10月5日やまちゃん

「Pythonの資格って、履歴書に書いても意味あるのかな？」「書くとしたら、どの欄にどう書けばいいの？」転職活動や社内の異動・評価の面談を …

AI・機械学習

scikit-learnの決定木入門！判定ルールを図で見える化して過学習を交差検証で防ぐ方法

2026年10月4日やまちゃん

「機械学習のモデルって、なぜその答えを出したのか分からなくてモヤモヤする…」「正解率は高いのに、本番で使うと全然当たらない」機械学習を触り …

Pythonでゲームを作るには何から学ぶ？入門の文法がそのままゲームになる仕組みを解説

2026年10月3日やまちゃん

「Pythonでゲームを作ってみたい。でも、何から勉強すればいいの？」「ゲーム用のライブラリの解説を読んだけど、コードの意味がほとんど分か …

【無料】Pythonを作りながら学べる入門コース｜全7章52レッスン・最初の4レッスンは登録なしで読める

2026年10月3日やまちゃん

「プログラミングを始めてみたい。でも、何から手をつければいいか分からない」「前に一度やってみたけど、環境構築やエラーで止まってしまった」 …

Pythonで複数のExcelを1つに集計！pandasで支店別売上を月次レポートにまとめる自動化入門

2026年10月3日やまちゃん

「毎月、支店や担当者から届くExcelをコピペでまとめるのがしんどい…」「ファイルが増えるたびに集計表を作り直している」こういう作業、地味 …

IoT・電子工作

Raspberry Piなしで動かす！gpiozeroのMockFactoryでLED・人感センサーをPCでテスト

2026年10月2日やまちゃん

「Raspberry Piで電子工作を始めたいけど、まだ本体が届いていない…」「配線してから動かないと、プログラムが悪いのか配線が悪いのか分 …

Pythonのリスト内包表記入門！for文との書き換え・if条件・辞書内包表記まで実例で解説

2026年10月1日やまちゃん

「Pythonのコードを読んでいたら [x * 2 for x in nums] みたいな1行が出てきて、何をしているのか分からない…」「 …

Python実践試験の頻出問題パターン3つと解き方のコツ｜実行結果・コード選択・エラー判定

2026年10月1日やまちゃん

「実践試験の問題って、結局どんな形で出るの？」「知識はあるはずなのに、選択肢を見ると迷ってしまう…」 Python 3 エンジニア認定実践試 …

AI・機械学習

Python×scikit-learnのk-meansで顧客をグループ分け！標準化とグループ数の決め方まで解説

2026年9月30日やまちゃん

「お客さんのデータはあるけど、どう分析すればいいか分からない…」「機械学習って、正解データを用意しないと始められないんでしょ？」──そんなふ …

Arduinoと土壌水分センサーで植物の自動水やり装置を作る！キャリブレーションと水のやりすぎ防止まで解説

2026年9月29日やまちゃん

「旅行や出張で数日家を空けると、観葉植物がしおれてしまう…」「水やりを忘れて枯らしてしまった」──そんな経験、ありますよね。この記事では、 …

Python実践試験で問われる標準ライブラリ活用まとめ｜実行結果を予測できるかで差がつく頻出モジュール

2026年9月29日やまちゃん

「実践試験の勉強を始めたけど、標準ライブラリが多すぎてどこから手をつければいいかわからない…」「Counter や defaultdict …

PythonのCounter・defaultdict入門！collectionsで集計とグループ分けを短く書く方法

2026年9月28日やまちゃん

「単語の出現回数を数えたいだけなのに、if key not in d: を毎回書くのが面倒…」「カテゴリごとにデータをまとめるコードが、い …

Pythonで請求書PDFを自動作成！ReportLabでインボイス対応の請求書を一括発行【フリーランス向け】

2026年9月27日やまちゃん

「毎月の請求書づくり、Excelのテンプレートをコピーして金額を打ち直すのが地味にしんどい…」「インボイス制度が始まってから、請求書に何を …

Pythonスクリプトを毎日決まった時刻に自動実行！タスクスケジューラ・cronの設定と動かないときの対処

2026年9月26日やまちゃん

「毎朝同じPythonスクリプトを手で実行してるんですけど、これ自動にできないんですか？」集計やバックアップ、Webサイトのチェックなど、 …

AI・機械学習

Python×scikit-learnで家計簿の支出を自動分類！カード明細を「食費・交通費…」に仕分けるAI入門

2026年9月25日やまちゃん

「家計簿アプリの自動分類、いまいち当たらなくて結局手で直してるんですよね…」カードの明細を見ながら「これは食費、これは交通費…」と仕分ける …

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