How to find the tangent point of a fit curve that passes through a non tangent point?

2 次查看（过去 30 天）
Khanh
Khanh 2014-12-1
Hi everyone,
I have curve that fit to data read from .xlsx file. How can I determine the tangent line as the picture below?
The number of the points is 100, so please see the xslx attached file.
Thank you.
My code:
clc
clear all
close all
filepath='c:\point for spline.xlsx';
data=xlsread(filepath,1,'a1:b99')
A_coor=data(1,:)
% --- CURVE FITTING --- %
f=fit(data(:,1),data(:,2),'pchip')
% --- PLOT THE CURVE AND POINT A --- %
plot(data(:,1),data(:,2),A_coor(1),A_coor(2),'ro')

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Linear and Nonlinear Regression 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by