---
title: kml_float_interp_min_size
description: "返回插值对象interp或插值类型T所需要的最小的点的数量。例如，三次插值最小需要3个点。"
url: https://www.hikunpeng.com/document/detail/zh/kunpengaccel/math-lib/devg-kml/kunpengaccel_kml_0471.html
sourcePath: /source/zh/kunpengaccel/math-lib/devg-kml/kunpengaccel_kml_0471.html
indexId: 7e2838d9843563994c496a97ef02445d9e696aba6fc2e708b8753c430091d4cc68
---
# kml_float_interp_min_size

返回插值对象interp或插值类型T所需要的最小的点的数量。例如，三次插值最小需要3个点。

#### 接口定义

size_t kml_float_interp_min_size(const kml_float_interp *interp)

unsigned int kml_float_interp_type_min_size(const kml_float_interp_type *T)


#### 参数

| 参数名 | 类型 | 描述 | 输入/输出 |
| --- | --- | --- | --- |
| interp | kml\_float\_interp\* | 插值对象指针。 | 输入 |


#### 依赖

#include "kml_interp.h"


#### 示例

```
const size_t xSize = 4;
float xArr[4] = {1,1.33,1.67,2};
float* yArr = (float*)malloc(xSize * sizeof(float));
float x = 1;
float y = 0;
kml_float_interp *interp = kml_float_interp_alloc(kml_float_interp_cspline, xSize);
size_t min_size = kml_float_interp_min_size(interp);
```