| Item type |
研究報告書 / Research Paper(1) |
| 公開日 |
2012-07-04 |
| タイトル |
|
|
タイトル |
斜面方位を説明変数とする回帰モデルについて |
| タイトル |
|
|
タイトル |
Recommended Regression Models Using Slope Direction as a Continuous Explanatory Variable |
| 言語 |
|
|
言語 |
jpn |
| キーワード |
|
|
主題 |
斜面方位, Slope direction, 三角関数, Trigonometric function, 3次曲線, Cubic curve, 極値, Extremal value, 精度, Precision |
| 資源タイプ |
|
|
資源 |
http://purl.org/coar/resource_type/c_18ws |
|
タイプ |
research report |
| 著者 |
荒瀬, 輝夫
岡野, 哲郎
熊谷, 真由子
内田, 泰三
|
| 信州大学研究者総覧へのリンク |
|
|
氏名 |
荒瀬, 輝夫 |
|
URL |
http://soar-rd.shinshu-u.ac.jp/profile/ja.uNyhPUkh.html |
| 信州大学研究者総覧へのリンク |
|
|
氏名 |
岡野, 哲郎 |
|
URL |
http://soar-rd.shinshu-u.ac.jp/profile/ja.WhDpgUfp.html |
| 出版者 |
|
|
出版者 |
信州大学環境科学研究会 |
| 引用 |
|
|
内容記述 |
環境科学年報34:6-9(2012) |
| 書誌情報 |
環境科学年報
巻 34,
p. 6-9,
発行日 2012-03-31
|
| 抄録 |
|
|
内容記述 |
Slope direction is an important environmental factor in various field studies, but it is difficult to employ as an explanatory variable in regression analysis because of its periodicity. In the present study, actual data was used to assess the goodness of fit of three different regression models using slope direction as an explanatory variable. Results show that a non-linear regression of y = a sin(θ + b) can be transformed into a linear multiple regression with sin θ and cos θ. A multiple regression, with sin θ and cos θ, should be applied when the two slope directions bearing a maximum or minimum are assumed to be exactly opposite to each other. Conversely, a cubic-curve regression should be applied when the two slope directions are not assumed to be opposite. Presumed errors of estimation were almost equal in the multiple and cubic-curve regressions. Furthermore, p-values were almost equal for both the multiple and cubic-curve regressions when there was little variation in the data, but the p-value for the cubic-curve regression dramatically increased as the variation in the data increased. |
| 資源タイプ（コンテンツの種類） |
|
|
内容記述タイプ |
Other |
|
内容記述 |
Article |
| ISSN |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0915-7492 |
| 書誌レコードID |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AN1054947X |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
34-02_Arase.pdf (154.8 kB)
