---
title: kml_?_spline2d_set
description: "设zarr在网格点(i,j)处为z。"
url: https://www.hikunpeng.com/document/detail/zh/kunpenghpcs/hpckit/devg/kunpengaccel_kml_0534.html
sourcePath: /source/zh/kunpenghpcs/hpckit/devg/kunpengaccel_kml_0534.html
indexId: cc1f5e3b75ec89af76d5753fc547370e88bfb3cc563cdeb088210531a2402b8e61
---
# kml_?_spline2d_set

设zarr在网格点(i,j)处为z。

#### 接口定义

int kml_float_spline2d_set(const kml_float_spline2d *spline, float zarr[], const size_t i, const size_t j, const float z)

int kml_double_spline2d_set(const kml_double_spline2d *spline, double zarr[], const size_t i, const size_t j,

const double z);


#### 参数

| 参数名 | 类型 | 描述 | 输入/输出 |
| --- | --- | --- | --- |
| spline | kml\_float\_spline2d\*, kml\_double\_spline2d\* | 插值对象指针。 | 输入 |
| zarr | float, double | 存有z值的数组。 | 输出 |
| i | size\_t | x方向的index。 | 输入 |
| j | size\_t | y方向的index。 | 输入 |
| z | float | 要改变的z值。 | 输入 |


#### 依赖

#include "kipl.h"


#### 示例

```
const size_t xSize = 4;
const size_t ySize = 4;
float xArr[4] = {1,1.33,1.67,2};
float yArr[4] = {1,1.33,1.67,2};
float* zArr = (float*)malloc(xSize * ySize * sizeof(float));
float x = 1;
float y = 1;
float z = 0;
kml_float_spline2d *spline = kml_float_spline2d_alloc(kml_float_interp2d_bicubic, xSize, ySize);
kml_float_spline2d_init(spline, xArr, yArr, zArr, xSize, ySize);
kml_float_spline2d_eval(spline, xArr, yArr, zArr, x, y, xacc, yacc, &z);
kml_float_spline2d_set(spline, zArr, x, y, z);
```